http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/InOperatorTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/InOperatorTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/InOperatorTest.java
index 256fecb..414d2c9 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/InOperatorTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/InOperatorTest.java
@@ -40,9 +40,9 @@ public class InOperatorTest {
   public void testToPredicate() throws Exception {
     String prop = "prop";
     String val = "one,2,three";
-    EqualsPredicate p1 = new EqualsPredicate<String>(prop, "one");
-    EqualsPredicate p2 = new EqualsPredicate<String>(prop, "2");
-    EqualsPredicate p3 = new EqualsPredicate<String>(prop, "three");
+    EqualsPredicate p1 = new EqualsPredicate<>(prop, "one");
+    EqualsPredicate p2 = new EqualsPredicate<>(prop, "2");
+    EqualsPredicate p3 = new EqualsPredicate<>(prop, "three");
     OrPredicate orPredicate = new OrPredicate(p1, p2, p3);
 
     assertEquals(orPredicate, new InOperator().toPredicate(prop, val));

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/LessEqualsOperatorTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/LessEqualsOperatorTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/LessEqualsOperatorTest.java
index 6e017b9..1702e33 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/LessEqualsOperatorTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/LessEqualsOperatorTest.java
@@ -38,7 +38,7 @@ public class LessEqualsOperatorTest {
 
   @Test
   public void testToPredicate() {
-    assertEquals(new LessEqualsPredicate<String>("1", "2"),
+    assertEquals(new LessEqualsPredicate<>("1", "2"),
         new LessEqualsOperator().toPredicate("1", "2"));
   }
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/LessOperatorTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/LessOperatorTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/LessOperatorTest.java
index 5311ea7..0f14055 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/LessOperatorTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/LessOperatorTest.java
@@ -38,7 +38,7 @@ public class LessOperatorTest {
 
   @Test
   public void testToPredicate() {
-    assertEquals(new LessPredicate<String>("1", "2"),
+    assertEquals(new LessPredicate<>("1", "2"),
         new LessOperator().toPredicate("1", "2"));
   }
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/NotEqualsOperatorTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/NotEqualsOperatorTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/NotEqualsOperatorTest.java
index d8e1f6a..4a28203 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/NotEqualsOperatorTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/NotEqualsOperatorTest.java
@@ -39,7 +39,7 @@ public class NotEqualsOperatorTest {
 
   @Test
   public void testToPredicate() {
-    assertEquals(new NotPredicate(new EqualsPredicate<String>("prop", "val")),
+    assertEquals(new NotPredicate(new EqualsPredicate<>("prop", "val")),
         new NotEqualsOperator().toPredicate("prop", "val"));
   }
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/NotOperatorTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/NotOperatorTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/NotOperatorTest.java
index c23bc3a..ce7c256 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/NotOperatorTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/NotOperatorTest.java
@@ -39,7 +39,7 @@ public class NotOperatorTest {
 
   @Test
   public void testToPredicate() {
-    EqualsPredicate p = new EqualsPredicate<String>("prop", "val");
+    EqualsPredicate p = new EqualsPredicate<>("prop", "val");
     NotPredicate notPredicate = new NotPredicate(p);
 
     assertEquals(notPredicate, new NotOperator(1).toPredicate(null, p));

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/OrOperatorTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/OrOperatorTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/OrOperatorTest.java
index 74ec171..dae6dab 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/OrOperatorTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/predicate/operators/OrOperatorTest.java
@@ -39,8 +39,8 @@ public class OrOperatorTest {
 
   @Test
   public void testToPredicate() {
-    EqualsPredicate p1 = new EqualsPredicate<String>("p1", "one");
-    EqualsPredicate p2 = new EqualsPredicate<String>("p2", "two");
+    EqualsPredicate p1 = new EqualsPredicate<>("p1", "one");
+    EqualsPredicate p2 = new EqualsPredicate<>("p2", "two");
     OrPredicate orPRedicate = new OrPredicate(p1, p2);
 
     assertEquals(orPRedicate, new OrOperator(1).toPredicate(p1, p2));

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/query/ExtendedResourcePredicateVisitorTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/ExtendedResourcePredicateVisitorTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/ExtendedResourcePredicateVisitorTest.java
index 4127806..93df18f 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/ExtendedResourcePredicateVisitorTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/ExtendedResourcePredicateVisitorTest.java
@@ -42,49 +42,49 @@ public class ExtendedResourcePredicateVisitorTest {
     Resource resource2 = new ResourceImpl(Resource.Type.Service);
     resource2.setProperty("name", "service2");
 
-    Map<String, Object> resource1SubProperties1 = new HashMap<String, 
Object>();
+    Map<String, Object> resource1SubProperties1 = new HashMap<>();
     resource1SubProperties1.put("sub1/category/p1", 1);
     resource1SubProperties1.put("sub1/category/p2", 2);
     resource1SubProperties1.put("sub1/category/p3", 3);
 
-    Map<String, Object> resource1SubProperties2 = new HashMap<String, 
Object>();
+    Map<String, Object> resource1SubProperties2 = new HashMap<>();
     resource1SubProperties2.put("sub1/category/p1", 1);
     resource1SubProperties2.put("sub1/category/p2", 4);
     resource1SubProperties2.put("sub1/category/p3", 6);
 
-    Map<String, Object> resource1SubProperties3 = new HashMap<String, 
Object>();
+    Map<String, Object> resource1SubProperties3 = new HashMap<>();
     resource1SubProperties3.put("sub1/category/p1", 1);
     resource1SubProperties3.put("sub1/category/p2", 8);
     resource1SubProperties3.put("sub1/category/p3", 12);
 
-    Set<Map<String, Object>> resource1SubPropertiesSet = new 
HashSet<Map<String, Object>>();
+    Set<Map<String, Object>> resource1SubPropertiesSet = new HashSet<>();
 
     resource1SubPropertiesSet.add(resource1SubProperties1);
     resource1SubPropertiesSet.add(resource1SubProperties2);
     resource1SubPropertiesSet.add(resource1SubProperties3);
 
-    Map<String, Object> resource2SubProperties1 = new HashMap<String, 
Object>();
+    Map<String, Object> resource2SubProperties1 = new HashMap<>();
     resource2SubProperties1.put("sub1/category/p1", 2);
     resource2SubProperties1.put("sub1/category/p2", 2);
     resource2SubProperties1.put("sub1/category/p3", 3);
 
-    Map<String, Object> resource2SubProperties2 = new HashMap<String, 
Object>();
+    Map<String, Object> resource2SubProperties2 = new HashMap<>();
     resource2SubProperties2.put("sub1/category/p1", 2);
     resource2SubProperties2.put("sub1/category/p2", 4);
     resource2SubProperties2.put("sub1/category/p3", 6);
 
-    Map<String, Object> resource2SubProperties3 = new HashMap<String, 
Object>();
+    Map<String, Object> resource2SubProperties3 = new HashMap<>();
     resource2SubProperties3.put("sub1/category/p1", 2);
     resource2SubProperties3.put("sub1/category/p2", 8);
     resource2SubProperties3.put("sub1/category/p3", 12);
 
-    Set<Map<String, Object>> resource2SubPropertiesSet = new 
HashSet<Map<String, Object>>();
+    Set<Map<String, Object>> resource2SubPropertiesSet = new HashSet<>();
 
     resource2SubPropertiesSet.add(resource2SubProperties1);
     resource2SubPropertiesSet.add(resource2SubProperties2);
     resource2SubPropertiesSet.add(resource2SubProperties3);
 
-    Map<Resource, Set<Map<String, Object>>> extendedPropertyMap = new 
HashMap<Resource, Set<Map<String, Object>>>();
+    Map<Resource, Set<Map<String, Object>>> extendedPropertyMap = new 
HashMap<>();
 
     extendedPropertyMap.put(resource1, resource1SubPropertiesSet);
     extendedPropertyMap.put(resource2, resource2SubPropertiesSet);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/query/JpaSortBuilderTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/JpaSortBuilderTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/JpaSortBuilderTest.java
index adbcd32..394de9f 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/JpaSortBuilderTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/JpaSortBuilderTest.java
@@ -114,7 +114,7 @@ public class JpaSortBuilderTest {
     MockAlertHistoryredicateVisitor visitor = new 
MockAlertHistoryredicateVisitor();
     PredicateHelper.visit(predicate, visitor);
 
-    JpaSortBuilder<AlertHistoryEntity> sortBuilder = new 
JpaSortBuilder<AlertHistoryEntity>();
+    JpaSortBuilder<AlertHistoryEntity> sortBuilder = new JpaSortBuilder<>();
     List<Order> sortOrders = sortBuilder.buildSortOrders(sortRequest, visitor);
 
     Assert.assertEquals(sortOrders.size(), 1);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/query/ProcessingPredicateVisitorTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/ProcessingPredicateVisitorTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/ProcessingPredicateVisitorTest.java
index 045f172..0bd83b5 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/ProcessingPredicateVisitorTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/ProcessingPredicateVisitorTest.java
@@ -41,7 +41,7 @@ public class ProcessingPredicateVisitorTest {
   public void testGetProcessedPredicate() throws Exception {
     ResourceDefinition resourceDefinition = new StackResourceDefinition();
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     mapIds.put(Resource.Type.Stack, "HDP");
 
     //test
@@ -65,7 +65,7 @@ public class ProcessingPredicateVisitorTest {
   public void testGetSubResourceForNotPredicate() throws Exception {
     ResourceDefinition resourceDefinition = new HostResourceDefinition();
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     mapIds.put(Resource.Type.Host, null);
 
     //test
@@ -90,7 +90,7 @@ public class ProcessingPredicateVisitorTest {
   public void testGetSubResourceCategories() throws Exception {
     ResourceDefinition resourceDefinition = new StackResourceDefinition();
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     mapIds.put(Resource.Type.Stack, "HDP");
 
     //test
@@ -105,7 +105,7 @@ public class ProcessingPredicateVisitorTest {
 
     Set<String> categories = visitor.getSubResourceCategories();
 
-    Set<String> expected = new HashSet<String>();
+    Set<String> expected = new HashSet<>();
     expected.add("versions");
 
     Assert.assertEquals(expected, categories);
@@ -115,7 +115,7 @@ public class ProcessingPredicateVisitorTest {
   public void testGetSubResourceProperties() throws Exception {
     ResourceDefinition resourceDefinition = new StackResourceDefinition();
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     mapIds.put(Resource.Type.Stack, "HDP");
 
     //test
@@ -130,7 +130,7 @@ public class ProcessingPredicateVisitorTest {
 
     Set<String> properties = visitor.getSubResourceProperties();
 
-    Set<String> expected = new HashSet<String>();
+    Set<String> expected = new HashSet<>();
     expected.add("versions/stackServices/StackServices/service_name");
     expected.add("versions/operatingSystems/OperatingSystems/os_type");
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/query/QueryImplTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/QueryImplTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/QueryImplTest.java
index fe3b773..397b101 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/QueryImplTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/QueryImplTest.java
@@ -89,7 +89,7 @@ public class QueryImplTest {
   public void testIsCollection__True() {
     ResourceDefinition resourceDefinition = 
createNiceMock(ResourceDefinition.class);
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     mapIds.put(Resource.Type.Cluster, "cluster");
     mapIds.put(Resource.Type.Service, null);
 
@@ -110,7 +110,7 @@ public class QueryImplTest {
   public void testIsCollection__False() {
     ResourceDefinition resourceDefinition = 
createNiceMock(ResourceDefinition.class);
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     mapIds.put(Resource.Type.Cluster, "cluster");
     mapIds.put(Resource.Type.Service, "service");
 
@@ -131,12 +131,12 @@ public class QueryImplTest {
   public void testExecute__Cluster_instance_noSpecifiedProps() throws 
Exception {
     ResourceDefinition resourceDefinition = 
createNiceMock(ResourceDefinition.class);
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     mapIds.put(Resource.Type.Cluster, "cluster");
 
     // expectations
     
expect(resourceDefinition.getType()).andReturn(Resource.Type.Cluster).anyTimes();
-    Set<SubResourceDefinition> setChildren = new 
HashSet<SubResourceDefinition>();
+    Set<SubResourceDefinition> setChildren = new HashSet<>();
     setChildren.add(new SubResourceDefinition(Resource.Type.Host));
 
     
expect(resourceDefinition.getSubResourceDefinitions()).andReturn(setChildren).anyTimes();
@@ -164,7 +164,7 @@ public class QueryImplTest {
   public void testExecute__Stack_instance_noSpecifiedProps() throws Exception {
     ResourceDefinition resourceDefinition = new StackResourceDefinition();
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     mapIds.put(Resource.Type.Stack, "HDP");
 
     //test
@@ -188,7 +188,7 @@ public class QueryImplTest {
   public void testGetJoinedResourceProperties() throws Exception {
     ResourceDefinition resourceDefinition = new StackResourceDefinition();
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     mapIds.put(Resource.Type.Stack, "HDP");
 
     //test
@@ -200,7 +200,7 @@ public class QueryImplTest {
 
     instance.execute();
 
-    Set<String> propertyIds = new HashSet<String>();
+    Set<String> propertyIds = new HashSet<>();
     
propertyIds.add("versions/operating_systems/repositories/Repositories/repo_id");
     propertyIds.add("versions/operating_systems/OperatingSystems/os_type");
 
@@ -229,7 +229,7 @@ public class QueryImplTest {
   public void testExecute_subResourcePredicate() throws Exception {
     ResourceDefinition resourceDefinition = new StackResourceDefinition();
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     mapIds.put(Resource.Type.Stack, "HDP");
 
     //test
@@ -272,7 +272,7 @@ public class QueryImplTest {
   public void testExecute_NoSuchResourceException() throws Exception {
     ResourceDefinition resourceDefinition = new ClusterResourceDefinition();
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     mapIds.put(Resource.Type.Cluster, "c1");
 
     ClusterController clusterController = 
createNiceMock(ClusterController.class);
@@ -314,7 +314,7 @@ public class QueryImplTest {
   public void testExecute_SubResourcePropertyPredicate() throws Exception {
     ResourceDefinition resourceDefinition = new ClusterResourceDefinition();
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     mapIds.put(Resource.Type.Cluster, "c1");
     mapIds.put(Resource.Type.Host, "h1");
 
@@ -412,7 +412,7 @@ public class QueryImplTest {
 
     
expect(schema.getKeyPropertyId(Resource.Type.Cluster)).andReturn("Clusters/cluster_name").anyTimes();
 
-    TreeNode<Set<String>> treeNode = new TreeNodeImpl<Set<String>>(null, 
Collections.<String>emptySet(), null);
+    TreeNode<Set<String>> treeNode = new TreeNodeImpl<>(null, 
Collections.<String>emptySet(), null);
     
expect(renderer.finalizeProperties(EasyMock.<TreeNode<QueryInfo>>anyObject(), 
anyBoolean())).andReturn(treeNode).anyTimes();
 
     Capture<Result> resultCapture = EasyMock.newCapture();
@@ -437,7 +437,7 @@ public class QueryImplTest {
   public void testExecute__Stack_instance_specifiedSubResources() throws 
Exception {
     ResourceDefinition resourceDefinition = new StackResourceDefinition();
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     mapIds.put(Resource.Type.Stack, "HDP");
 
     //test
@@ -501,7 +501,7 @@ public class QueryImplTest {
 
     ResourceDefinition resourceDefinition = new 
StackVersionResourceDefinition();
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
 
     //test
     QueryImpl instance = new TestQuery(mapIds, resourceDefinition);
@@ -544,7 +544,7 @@ public class QueryImplTest {
 
     ResourceDefinition resourceDefinition = new 
StackVersionResourceDefinition();
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
 
     QueryImpl instance = new TestQuery(mapIds, resourceDefinition);
     instance.addProperty("operating_systems/*", null);
@@ -610,11 +610,11 @@ public class QueryImplTest {
   public void testExecute__Host_collection_noSpecifiedProps() throws Exception 
{
     ResourceDefinition resourceDefinition = 
createNiceMock(ResourceDefinition.class);
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
 
     // expectations
     
expect(resourceDefinition.getType()).andReturn(Resource.Type.Host).anyTimes();
-    Set<SubResourceDefinition> setChildren = new 
HashSet<SubResourceDefinition>();
+    Set<SubResourceDefinition> setChildren = new HashSet<>();
 
     
expect(resourceDefinition.getSubResourceDefinitions()).andReturn(setChildren).anyTimes();
 
@@ -650,7 +650,7 @@ public class QueryImplTest {
   @Test
   public void testExecute__Host_collection_AlertsSummary() throws Exception {
     ResourceDefinition resourceDefinition = new HostResourceDefinition();
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     final AtomicInteger pageCallCount = new AtomicInteger(0);
     ClusterControllerImpl clusterControllerImpl = new 
ClusterControllerImpl(new ClusterControllerImplTest.TestProviderModule()) {
       @Override
@@ -722,11 +722,11 @@ public class QueryImplTest {
   public void 
testExecute__collection_nullInternalPredicate_nullUserPredicate() throws 
Exception {
     ResourceDefinition resourceDefinition = 
createNiceMock(ResourceDefinition.class);
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
 
     // expectations
     
expect(resourceDefinition.getType()).andReturn(Resource.Type.Cluster).anyTimes();
-    Set<SubResourceDefinition> setChildren = new 
HashSet<SubResourceDefinition>();
+    Set<SubResourceDefinition> setChildren = new HashSet<>();
     setChildren.add(new SubResourceDefinition(Resource.Type.Host));
 
     
expect(resourceDefinition.getSubResourceDefinitions()).andReturn(setChildren).anyTimes();
@@ -753,12 +753,12 @@ public class QueryImplTest {
   public void 
testExecute__collection_nullInternalPredicate_nonNullUserPredicate() throws 
Exception {
     ResourceDefinition resourceDefinition = 
createNiceMock(ResourceDefinition.class);
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
     mapIds.put(Resource.Type.Cluster, "cluster");
 
     // expectations
     
expect(resourceDefinition.getType()).andReturn(Resource.Type.Host).anyTimes();
-    Set<SubResourceDefinition> setChildren = new 
HashSet<SubResourceDefinition>();
+    Set<SubResourceDefinition> setChildren = new HashSet<>();
 
     
expect(resourceDefinition.getSubResourceDefinitions()).andReturn(setChildren).anyTimes();
 
@@ -789,11 +789,11 @@ public class QueryImplTest {
   public void 
testExecute__collection_nonNullInternalPredicate_nonNullUserPredicate() throws 
Exception {
     ResourceDefinition resourceDefinition = 
createNiceMock(ResourceDefinition.class);
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
 
     // expectations
     
expect(resourceDefinition.getType()).andReturn(Resource.Type.Host).anyTimes();
-    Set<SubResourceDefinition> setChildren = new 
HashSet<SubResourceDefinition>();
+    Set<SubResourceDefinition> setChildren = new HashSet<>();
 
     
expect(resourceDefinition.getSubResourceDefinitions()).andReturn(setChildren).anyTimes();
 
@@ -824,11 +824,11 @@ public class QueryImplTest {
   public void testAddProperty__localProperty() throws Exception {
     ResourceDefinition resourceDefinition = 
createNiceMock(ResourceDefinition.class);
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
 
     // expectations
     
expect(resourceDefinition.getType()).andReturn(Resource.Type.Host).anyTimes();
-    Set<SubResourceDefinition> setChildren = new 
HashSet<SubResourceDefinition>();
+    Set<SubResourceDefinition> setChildren = new HashSet<>();
 
     
expect(resourceDefinition.getSubResourceDefinitions()).andReturn(setChildren).anyTimes();
 
@@ -871,11 +871,11 @@ public class QueryImplTest {
   public void testAddProperty__allCategoryProperties() throws Exception {
     ResourceDefinition resourceDefinition = 
createNiceMock(ResourceDefinition.class);
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
 
     // expectations
     
expect(resourceDefinition.getType()).andReturn(Resource.Type.Host).anyTimes();
-    Set<SubResourceDefinition> setChildren = new 
HashSet<SubResourceDefinition>();
+    Set<SubResourceDefinition> setChildren = new HashSet<>();
 
     
expect(resourceDefinition.getSubResourceDefinitions()).andReturn(setChildren).anyTimes();
 
@@ -966,7 +966,7 @@ public class QueryImplTest {
     // simulate the case of a renderer that does not need the property 
providers to execute
     // this method should be called twice: once each resource (1 resource, 1 
sub-resource in this test)
     
expect(mockRenderer.requiresPropertyProviderInput()).andReturn(false).times(2);
-    expect(mockRenderer.finalizeProperties(isA(TreeNode.class), 
eq(true))).andReturn(new TreeNodeImpl<Set<String>>(null, 
Collections.<String>emptySet(), "test-node"));
+    expect(mockRenderer.finalizeProperties(isA(TreeNode.class), 
eq(true))).andReturn(new TreeNodeImpl<>(null, Collections.<String>emptySet(), 
"test-node"));
     expect(mockRenderer.finalizeResult(isA(Result.class))).andReturn(null);
 
     // note: the expectations for the ClusterController mock are significant 
to this test.
@@ -984,7 +984,7 @@ public class QueryImplTest {
 
     expect(mockResource.getType()).andReturn(Resource.Type.Host).atLeastOnce();
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
 
     mockSupport.replayAll();
 
@@ -1044,7 +1044,7 @@ public class QueryImplTest {
     // simulate the case of a renderer that requires the property providers to 
execute
     // this method should be called twice: once for each resource (1 resource, 
1 sub-resource in this test)
     
expect(mockRenderer.requiresPropertyProviderInput()).andReturn(true).times(2);
-    expect(mockRenderer.finalizeProperties(isA(TreeNode.class), 
eq(true))).andReturn(new TreeNodeImpl<Set<String>>(null, 
Collections.<String>emptySet(), "test-node"));
+    expect(mockRenderer.finalizeProperties(isA(TreeNode.class), 
eq(true))).andReturn(new TreeNodeImpl<>(null, Collections.<String>emptySet(), 
"test-node"));
     expect(mockRenderer.finalizeResult(isA(Result.class))).andReturn(null);
 
     // note: the expectations for the ClusterController mock are significant 
to this test.
@@ -1064,7 +1064,7 @@ public class QueryImplTest {
 
     expect(mockResource.getType()).andReturn(Resource.Type.Host).atLeastOnce();
 
-    Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>();
+    Map<Resource.Type, String> mapIds = new HashMap<>();
 
     mockSupport.replayAll();
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/query/QueryInfoTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/QueryInfoTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/QueryInfoTest.java
index 15b798b..2a0ac85 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/QueryInfoTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/QueryInfoTest.java
@@ -34,7 +34,7 @@ import org.junit.Test;
 public class QueryInfoTest {
   @Test
   public void testGetProperties() {
-    Set<String> properties = new HashSet<String>();
+    Set<String> properties = new HashSet<>();
     QueryInfo info = new QueryInfo(new ClusterResourceDefinition(), 
properties);
 
     assertEquals(properties, info.getProperties());

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/ClusterBlueprintRendererTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/ClusterBlueprintRendererTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/ClusterBlueprintRendererTest.java
index 75ffd31..13db5f8 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/ClusterBlueprintRendererTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/ClusterBlueprintRendererTest.java
@@ -99,21 +99,21 @@ public class ClusterBlueprintRendererTest {
   private static final Configuration emptyConfiguration = new 
Configuration(new HashMap<String, Map<String, String>>(),
       new HashMap<String, Map<String, Map<String, String>>>());
 
-  private static final Map<String, Map<String, String>> clusterProps = new 
HashMap<String, Map<String, String>>();
+  private static final Map<String, Map<String, String>> clusterProps = new 
HashMap<>();
   private static final Map<String, Map<String, Map<String, String>>> 
clusterAttributes =
-      new HashMap<String, Map<String, Map<String, String>>>();
+    new HashMap<>();
 
   private static final Configuration clusterConfig = new 
Configuration(clusterProps, clusterAttributes);
   @Before
   public void setup() throws Exception {
 
-    Map<String, String> clusterTypeProps = new HashMap<String, String>();
+    Map<String, String> clusterTypeProps = new HashMap<>();
     clusterProps.put("test-type-one", clusterTypeProps);
     clusterTypeProps.put("propertyOne", "valueOne");
 
-    Map<String, Map<String, String>> clusterTypeAttributes = new 
HashMap<String, Map<String, String>>();
+    Map<String, Map<String, String>> clusterTypeAttributes = new HashMap<>();
     clusterAttributes.put("test-type-one", clusterTypeAttributes);
-    Map<String, String> clusterAttributeProps = new HashMap<String, String>();
+    Map<String, String> clusterAttributeProps = new HashMap<>();
     clusterAttributeProps.put("propertyOne", "true");
     clusterTypeAttributes.put("final", clusterAttributeProps);
 
@@ -122,11 +122,11 @@ public class ClusterBlueprintRendererTest {
 
     Collection<Component> group2Components = Arrays.asList(new 
Component("TASKTRACKER"), new Component("DATANODE"));
 
-    Map<String, Configuration> hostGroupConfigs = new HashMap<String, 
Configuration>();
+    Map<String, Configuration> hostGroupConfigs = new HashMap<>();
     hostGroupConfigs.put("host_group_1", emptyConfiguration);
     hostGroupConfigs.put("host_group_2", emptyConfiguration);
 
-    Map<String, HostGroup> hostGroups = new HashMap<String, HostGroup>();
+    Map<String, HostGroup> hostGroups = new HashMap<>();
     hostGroups.put("host_group_1", group1);
     hostGroups.put("host_group_2", group2);
 
@@ -134,7 +134,7 @@ public class ClusterBlueprintRendererTest {
     group1Info.addHost("host1");
     group1Info.setConfiguration(emptyConfiguration);
     HostGroupInfo group2Info = new HostGroupInfo("host_group_2");
-    Map<String, HostGroupInfo> groupInfoMap = new HashMap<String, 
HostGroupInfo>();
+    Map<String, HostGroupInfo> groupInfoMap = new HashMap<>();
     group2Info.addHosts(Arrays.asList("host2", "host3"));
     group2Info.setConfiguration(emptyConfiguration);
     groupInfoMap.put("host_group_1", group1Info);
@@ -172,7 +172,7 @@ public class ClusterBlueprintRendererTest {
     group1Info.addHost("host1");
     group1Info.setConfiguration(emptyConfiguration);
     HostGroupInfo group2Info = new HostGroupInfo("host_group_2");
-    Map<String, HostGroupInfo> groupInfoMap = new HashMap<String, 
HostGroupInfo>();
+    Map<String, HostGroupInfo> groupInfoMap = new HashMap<>();
     group2Info.addHosts(Arrays.asList("host2", "host3"));
     group2Info.setConfiguration(emptyConfiguration);
     groupInfoMap.put("host_group_1", group1Info);
@@ -217,7 +217,7 @@ public class ClusterBlueprintRendererTest {
   @Test
   public void testFinalizeProperties__instance() {
     QueryInfo rootQuery = new QueryInfo(new ClusterResourceDefinition(), new 
HashSet<String>());
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Cluster");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Cluster");
     rootQuery.getProperties().add("foo/bar");
     rootQuery.getProperties().add("prop1");
 
@@ -384,7 +384,7 @@ public class ClusterBlueprintRendererTest {
   @Test
   public void testFinalizeProperties__instance_noComponentNode() {
     QueryInfo rootQuery = new QueryInfo(new ClusterResourceDefinition(), new 
HashSet<String>());
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Cluster");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Cluster");
     rootQuery.getProperties().add("foo/bar");
     rootQuery.getProperties().add("prop1");
 
@@ -461,10 +461,10 @@ public class ClusterBlueprintRendererTest {
         // 4 specified components and ambari server
         assertEquals(5, components.size());
 
-        Set<String> expectedValues = new HashSet<String>(
-            Arrays.asList("JOBTRACKER", "TASKTRACKER", "NAMENODE", "DATANODE", 
"AMBARI_SERVER"));
+        Set<String> expectedValues = new HashSet<>(
+          Arrays.asList("JOBTRACKER", "TASKTRACKER", "NAMENODE", "DATANODE", 
"AMBARI_SERVER"));
 
-        Set<String> actualValues = new HashSet<String>();
+        Set<String> actualValues = new HashSet<>();
 
 
         for (Map<String, String> componentProperties : components) {
@@ -479,10 +479,10 @@ public class ClusterBlueprintRendererTest {
         Collection<Map<String, String>> components = (Collection<Map<String, 
String>>) hostGroupProperties.get("components");
         assertEquals(2, components.size());
 
-        Set<String> expectedValues = new HashSet<String>(
-            Arrays.asList("TASKTRACKER", "DATANODE"));
+        Set<String> expectedValues = new HashSet<>(
+          Arrays.asList("TASKTRACKER", "DATANODE"));
 
-        Set<String> actualValues = new HashSet<String>();
+        Set<String> actualValues = new HashSet<>();
 
 
         for (Map<String, String> componentProperties : components) {
@@ -503,7 +503,7 @@ public class ClusterBlueprintRendererTest {
 
     Result result = new ResultImpl(true);
     Map<String, Object> testDesiredConfigMap =
-      new HashMap<String, Object>();
+      new HashMap<>();
 
     DesiredConfig testDesiredConfig =
       new DesiredConfig();
@@ -540,10 +540,10 @@ public class ClusterBlueprintRendererTest {
         // 4 specified components and ambari server
         assertEquals(5, components.size());
 
-        Set<String> expectedValues = new HashSet<String>(
+        Set<String> expectedValues = new HashSet<>(
           Arrays.asList("JOBTRACKER", "TASKTRACKER", "NAMENODE", "DATANODE", 
"AMBARI_SERVER"));
 
-        Set<String> actualValues = new HashSet<String>();
+        Set<String> actualValues = new HashSet<>();
 
 
         for (Map<String, String> componentProperties : components) {
@@ -558,10 +558,10 @@ public class ClusterBlueprintRendererTest {
         Collection<Map<String, String>> components = (Collection<Map<String, 
String>>) hostGroupProperties.get("components");
         assertEquals(2, components.size());
 
-        Set<String> expectedValues = new HashSet<String>(
+        Set<String> expectedValues = new HashSet<>(
           Arrays.asList("TASKTRACKER", "DATANODE"));
 
-        Set<String> actualValues = new HashSet<String>();
+        Set<String> actualValues = new HashSet<>();
 
 
         for (Map<String, String> componentProperties : components) {

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/DefaultRendererTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/DefaultRendererTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/DefaultRendererTest.java
index add1919..1ede9f5 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/DefaultRendererTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/DefaultRendererTest.java
@@ -61,7 +61,7 @@ public class DefaultRendererTest {
     replay(schemaFactory, schema);
 
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), new 
HashSet<String>());
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
 
     DefaultRenderer renderer = new DefaultRenderer();
     renderer.init(schemaFactory);
@@ -90,10 +90,10 @@ public class DefaultRendererTest {
 
     replay(schemaFactory, schema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     serviceProperties.add("foo/bar");
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
 
     DefaultRenderer renderer = new DefaultRenderer();
     renderer.init(schemaFactory);
@@ -121,9 +121,9 @@ public class DefaultRendererTest {
 
     replay(schemaFactory, schema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
 
     DefaultRenderer renderer = new DefaultRenderer();
     renderer.init(schemaFactory);
@@ -150,10 +150,10 @@ public class DefaultRendererTest {
 
     replay(schemaFactory, schema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     serviceProperties.add("foo/bar");
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
 
     DefaultRenderer renderer = new DefaultRenderer();
     renderer.init(schemaFactory);
@@ -185,9 +185,9 @@ public class DefaultRendererTest {
 
     replay(schemaFactory, serviceSchema, componentSchema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
     queryTree.addChild(new QueryInfo(new ComponentResourceDefinition(), new 
HashSet<String>()), "Component");
 
     DefaultRenderer renderer = new DefaultRenderer();
@@ -225,11 +225,11 @@ public class DefaultRendererTest {
 
     replay(schemaFactory, serviceSchema, componentSchema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     serviceProperties.add("foo/bar");
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
-    HashSet<String> componentProperties = new HashSet<String>();
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
+    HashSet<String> componentProperties = new HashSet<>();
     componentProperties.add("goo/car");
     queryTree.addChild(new QueryInfo(new ComponentResourceDefinition(), 
componentProperties), "Component");
 
@@ -270,9 +270,9 @@ public class DefaultRendererTest {
 
     replay(schemaFactory, serviceSchema, componentSchema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
     queryTree.addChild(new QueryInfo(new ComponentResourceDefinition(), new 
HashSet<String>()), "Component");
 
     DefaultRenderer renderer = new DefaultRenderer();
@@ -310,10 +310,10 @@ public class DefaultRendererTest {
 
     replay(schemaFactory, serviceSchema, componentSchema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     serviceProperties.add("foo/bar");
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
     queryTree.addChild(new QueryInfo(new ComponentResourceDefinition(), new 
HashSet<String>()), "Component");
 
     DefaultRenderer renderer = new DefaultRenderer();

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/MetricsPaddingRendererTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/MetricsPaddingRendererTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/MetricsPaddingRendererTest.java
index e99271e..b872bb8 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/MetricsPaddingRendererTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/MetricsPaddingRendererTest.java
@@ -49,10 +49,10 @@ public class MetricsPaddingRendererTest {
 
     replay(schemaFactory, schema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     serviceProperties.add("foo/bar");
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
 
     MetricsPaddingRenderer renderer = new 
MetricsPaddingRenderer("null_padding");
     renderer.init(schemaFactory);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/MinimalRendererTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/MinimalRendererTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/MinimalRendererTest.java
index 687dcbb..31aa3ad 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/MinimalRendererTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/query/render/MinimalRendererTest.java
@@ -64,7 +64,7 @@ public class MinimalRendererTest {
     replay(schemaFactory, schema);
 
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), new 
HashSet<String>());
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
 
     MinimalRenderer renderer = new MinimalRenderer();
     renderer.init(schemaFactory);
@@ -91,10 +91,10 @@ public class MinimalRendererTest {
 
     replay(schemaFactory, schema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     serviceProperties.add("foo/bar");
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
 
     MinimalRenderer renderer = new MinimalRenderer();
     renderer.init(schemaFactory);
@@ -120,9 +120,9 @@ public class MinimalRendererTest {
 
     replay(schemaFactory, schema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
 
     MinimalRenderer renderer = new MinimalRenderer();
     renderer.init(schemaFactory);
@@ -147,10 +147,10 @@ public class MinimalRendererTest {
 
     replay(schemaFactory, schema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     serviceProperties.add("foo/bar");
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
 
     MinimalRenderer renderer = new MinimalRenderer();
     renderer.init(schemaFactory);
@@ -179,9 +179,9 @@ public class MinimalRendererTest {
 
     replay(schemaFactory, serviceSchema, componentSchema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
     queryTree.addChild(new QueryInfo(new ComponentResourceDefinition(), new 
HashSet<String>()), "Component");
 
     MinimalRenderer renderer = new MinimalRenderer();
@@ -216,11 +216,11 @@ public class MinimalRendererTest {
 
     replay(schemaFactory, serviceSchema, componentSchema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     serviceProperties.add("foo/bar");
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
-    HashSet<String> componentProperties = new HashSet<String>();
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
+    HashSet<String> componentProperties = new HashSet<>();
     componentProperties.add("goo/car");
     queryTree.addChild(new QueryInfo(new ComponentResourceDefinition(), 
componentProperties), "Component");
 
@@ -256,9 +256,9 @@ public class MinimalRendererTest {
 
     replay(schemaFactory, serviceSchema, componentSchema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
     queryTree.addChild(new QueryInfo(new ComponentResourceDefinition(), new 
HashSet<String>()), "Component");
 
     MinimalRenderer renderer = new MinimalRenderer();
@@ -292,10 +292,10 @@ public class MinimalRendererTest {
 
     replay(schemaFactory, serviceSchema, componentSchema);
 
-    HashSet<String> serviceProperties = new HashSet<String>();
+    HashSet<String> serviceProperties = new HashSet<>();
     serviceProperties.add("foo/bar");
     QueryInfo rootQuery = new QueryInfo(new ServiceResourceDefinition(), 
serviceProperties);
-    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<QueryInfo>(null, 
rootQuery, "Service");
+    TreeNode<QueryInfo> queryTree = new TreeNodeImpl<>(null, rootQuery, 
"Service");
     queryTree.addChild(new QueryInfo(new ComponentResourceDefinition(), new 
HashSet<String>()), "Component");
 
     MinimalRenderer renderer = new MinimalRenderer();
@@ -456,8 +456,8 @@ public class MinimalRendererTest {
 
 
   private TreeNode<QueryInfo> createPropertyTree() {
-    TreeNode<QueryInfo> propertyTree = new TreeNodeImpl<QueryInfo>(null, new 
QueryInfo(
-        new ClusterResourceDefinition(), new HashSet<String>()), "Cluster");
+    TreeNode<QueryInfo> propertyTree = new TreeNodeImpl<>(null, new QueryInfo(
+      new ClusterResourceDefinition(), new HashSet<String>()), "Cluster");
     Set<String> clusterProperties = propertyTree.getObject().getProperties();
     clusterProperties.add("Clusters/cluster_name");
     clusterProperties.add("Clusters/version");
@@ -468,8 +468,8 @@ public class MinimalRendererTest {
   }
 
   private TreeNode<QueryInfo> createPropertyTreeWithSubProps() {
-    TreeNode<QueryInfo> propertyTree = new TreeNodeImpl<QueryInfo>(null, new 
QueryInfo(
-        new ClusterResourceDefinition(), new HashSet<String>()), "Cluster");
+    TreeNode<QueryInfo> propertyTree = new TreeNodeImpl<>(null, new QueryInfo(
+      new ClusterResourceDefinition(), new HashSet<String>()), "Cluster");
     Set<String> clusterProperties = propertyTree.getObject().getProperties();
     clusterProperties.add("Clusters/cluster_name");
     clusterProperties.add("Clusters/version");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/resources/BaseResourceDefinitionTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/resources/BaseResourceDefinitionTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/resources/BaseResourceDefinitionTest.java
index 83aca19..e076268 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/resources/BaseResourceDefinitionTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/resources/BaseResourceDefinitionTest.java
@@ -84,8 +84,8 @@ public class BaseResourceDefinitionTest {
     Resource service = new ResourceImpl(Resource.Type.Service);
     service.setProperty("ServiceInfo/service_name", "Service1");
 
-    TreeNode<Resource> parentNode  = new TreeNodeImpl<Resource>(null, null, 
"services");
-    TreeNode<Resource> serviceNode = new TreeNodeImpl<Resource>(parentNode, 
service, "service1");
+    TreeNode<Resource> parentNode  = new TreeNodeImpl<>(null, null, 
"services");
+    TreeNode<Resource> serviceNode = new TreeNodeImpl<>(parentNode, service, 
"service1");
 
     parentNode.setProperty("isCollection", "true");
     
@@ -117,8 +117,8 @@ public class BaseResourceDefinitionTest {
     Resource configGroup = new ResourceImpl(Resource.Type.ConfigGroup);
     configGroup.setProperty("ConfigGroup/id", "2");
 
-    TreeNode<Resource> resourcesNode   = new TreeNodeImpl<Resource>(null, 
null, BaseManagementHandler.RESOURCES_NODE_NAME);
-    TreeNode<Resource> configGroupNode = new 
TreeNodeImpl<Resource>(resourcesNode, configGroup, "configGroup1");
+    TreeNode<Resource> resourcesNode   = new TreeNodeImpl<>(null, null, 
BaseManagementHandler.RESOURCES_NODE_NAME);
+    TreeNode<Resource> configGroupNode = new TreeNodeImpl<>(resourcesNode, 
configGroup, "configGroup1");
 
     resourcesNode.setProperty("isCollection", "true");
 
@@ -151,7 +151,7 @@ public class BaseResourceDefinitionTest {
 
     assertEquals(Collections.emptySet(), resource.getReadDirectives());
 
-    Map<BaseResourceDefinition.DirectiveType, List<String>> directives = new 
HashMap<BaseResourceDefinition.DirectiveType, List<String>>();
+    Map<BaseResourceDefinition.DirectiveType, List<String>> directives = new 
HashMap<>();
     directives.put(BaseResourceDefinition.DirectiveType.DELETE, 
Arrays.asList("do_something_delete", "do_something_else_delete"));
     directives.put(BaseResourceDefinition.DirectiveType.READ, 
Arrays.asList("do_something_get", "do_something_else_get"));
     directives.put(BaseResourceDefinition.DirectiveType.CREATE, 
Arrays.asList("do_something_post", "do_something_else_post"));

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/resources/PermissionResourceDefinitionTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/resources/PermissionResourceDefinitionTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/resources/PermissionResourceDefinitionTest.java
index d2da5a1..8158cb6 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/resources/PermissionResourceDefinitionTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/resources/PermissionResourceDefinitionTest.java
@@ -45,7 +45,7 @@ public class PermissionResourceDefinitionTest {
   public void testGetSubResourceDefinitions() throws Exception {
     PermissionResourceDefinition permissionResourceDefinition = new 
PermissionResourceDefinition();
     Set<SubResourceDefinition> subResourceDefinitions = 
permissionResourceDefinition.getSubResourceDefinitions ();
-    Set<Resource.Type> expectedSubTypes = new HashSet<Resource.Type>();
+    Set<Resource.Type> expectedSubTypes = new HashSet<>();
     expectedSubTypes.add(Resource.Type.RoleAuthorization);
 
     Assert.assertEquals(1, subResourceDefinitions.size());

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/resources/SimpleResourceDefinitionTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/resources/SimpleResourceDefinitionTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/resources/SimpleResourceDefinitionTest.java
index d246479..9d8fb04 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/resources/SimpleResourceDefinitionTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/resources/SimpleResourceDefinitionTest.java
@@ -61,7 +61,7 @@ public class SimpleResourceDefinitionTest {
     validateDirectives(Collections.<String>emptySet(), 
resourceDefinition.getUpdateDirectives());
     validateDirectives(Collections.<String>emptySet(), 
resourceDefinition.getDeleteDirectives());
 
-    HashMap<BaseResourceDefinition.DirectiveType, Collection<String>> 
directives = new HashMap<BaseResourceDefinition.DirectiveType, 
Collection<String>>();
+    HashMap<BaseResourceDefinition.DirectiveType, Collection<String>> 
directives = new HashMap<>();
     directives.put(BaseResourceDefinition.DirectiveType.CREATE, 
Arrays.asList("POST1", "POST2"));
     directives.put(BaseResourceDefinition.DirectiveType.READ, 
Arrays.asList("GET1", "GET2"));
     directives.put(BaseResourceDefinition.DirectiveType.UPDATE, 
Arrays.asList("PUT1", "PUT2"));

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/resources/ViewInstanceResourceDefinitionTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/resources/ViewInstanceResourceDefinitionTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/resources/ViewInstanceResourceDefinitionTest.java
index 22639f6..2ed9403 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/resources/ViewInstanceResourceDefinitionTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/resources/ViewInstanceResourceDefinitionTest.java
@@ -55,7 +55,7 @@ public class ViewInstanceResourceDefinitionTest {
   }
 
   public static ViewInstanceResourceDefinition 
getViewInstanceResourceDefinition() {
-    Set<SubResourceDefinition> subResourceDefinitions = new 
HashSet<SubResourceDefinition>();
+    Set<SubResourceDefinition> subResourceDefinitions = new HashSet<>();
 
     subResourceDefinitions.add(new SubResourceDefinition(new 
Resource.Type("sub1")));
     subResourceDefinitions.add(new SubResourceDefinition(new 
Resource.Type("sub2")));

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/ActionServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ActionServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ActionServiceTest.java
index 04e63ca..b5fb6f8 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ActionServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ActionServiceTest.java
@@ -37,7 +37,7 @@ import 
org.apache.ambari.server.api.services.serializers.ResultSerializer;
 public class ActionServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getActionDefinition
     ActionService service = new TestActionDefinitionService("actionName");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/AmbariMetaInfoTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/AmbariMetaInfoTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/AmbariMetaInfoTest.java
index 9ff7def..b80e39c 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/AmbariMetaInfoTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/AmbariMetaInfoTest.java
@@ -572,10 +572,10 @@ public class AmbariMetaInfoTest {
   public void testGetRepos() throws Exception {
     Map<String, List<RepositoryInfo>> repos = metaInfo.getRepository(
         STACK_NAME_HDP, STACK_VERSION_HDP);
-    Set<String> centos5Cnt = new HashSet<String>();
-    Set<String> centos6Cnt = new HashSet<String>();
-    Set<String> redhat6cnt = new HashSet<String>();
-    Set<String> redhat5cnt = new HashSet<String>();
+    Set<String> centos5Cnt = new HashSet<>();
+    Set<String> centos6Cnt = new HashSet<>();
+    Set<String> redhat6cnt = new HashSet<>();
+    Set<String> redhat5cnt = new HashSet<>();
 
     for (List<RepositoryInfo> vals : repos.values()) {
       for (RepositoryInfo repo : vals) {
@@ -1047,7 +1047,7 @@ public class AmbariMetaInfoTest {
                 }
               }
             }
-            LinkedList<String> failedMetrics = new LinkedList<String>();
+            LinkedList<String> failedMetrics = new LinkedList<>();
             for (MetricDefinition metricDefinition : list) {
               if ("ganglia".equals(metricDefinition.getType())) {
                 //all ams metrics should be temporal

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/BaseServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/BaseServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/BaseServiceTest.java
index fe28735..52e9b77 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/BaseServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/BaseServiceTest.java
@@ -210,7 +210,7 @@ public abstract class BaseServiceTest {
     private Object[] m_args;
     private String m_body;
 
-    private static final Map<Request.Type, Integer> mapStatusCodes = new 
HashMap<Request.Type, Integer>();
+    private static final Map<Request.Type, Integer> mapStatusCodes = new 
HashMap<>();
 
     static {
       mapStatusCodes.put(Request.Type.GET, 200);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/BlueprintServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/BlueprintServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/BlueprintServiceTest.java
index 26eb91f..165dd6c 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/BlueprintServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/BlueprintServiceTest.java
@@ -38,7 +38,7 @@ public class BlueprintServiceTest extends BaseServiceTest {
 
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getBlueprint
     BlueprintService BlueprintService = new 
TestBlueprintService("blueprintName");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterKerberosDescriptorServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterKerberosDescriptorServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterKerberosDescriptorServiceTest.java
index 554e950..ab83dfd 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterKerberosDescriptorServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterKerberosDescriptorServiceTest.java
@@ -38,7 +38,7 @@ public class ClusterKerberosDescriptorServiceTest extends 
BaseServiceTest {
 
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     ClusterKerberosDescriptorService service;
     Method m;

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterPrivilegeServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterPrivilegeServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterPrivilegeServiceTest.java
index f05a580..a1c8d6c 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterPrivilegeServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterPrivilegeServiceTest.java
@@ -36,7 +36,7 @@ public class ClusterPrivilegeServiceTest extends 
BaseServiceTest {
 
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getPrivilege
     ClusterPrivilegeService privilegeService = new 
TestClusterPrivilegeService("c1");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterServiceTest.java
index 7e564a1..cfc43f5 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterServiceTest.java
@@ -48,7 +48,7 @@ public class ClusterServiceTest extends BaseServiceTest {
 
   @Override
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     ClusterDAO clusterDAO = EasyMock.createNiceMock(ClusterDAO.class);
     HostDAO hostDAO = EasyMock.createNiceMock(HostDAO.class);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterStackVersionServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterStackVersionServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterStackVersionServiceTest.java
index 782a142..ac607fb 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterStackVersionServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ClusterStackVersionServiceTest.java
@@ -41,7 +41,7 @@ import junit.framework.TestCase;
 public class ClusterStackVersionServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     ClusterStackVersionService clusterStackVersionService;
     Method m;

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/ComponentServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ComponentServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ComponentServiceTest.java
index c658165..9ced9b3 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ComponentServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ComponentServiceTest.java
@@ -39,7 +39,7 @@ import 
org.apache.ambari.server.api.services.serializers.ResultSerializer;
 public class ComponentServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getComponent
     ComponentService service = new TestComponentService("clusterName", 
"serviceName", "componentName");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/ConfigGroupServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ConfigGroupServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ConfigGroupServiceTest.java
index 4c2e975..88ee500 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ConfigGroupServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ConfigGroupServiceTest.java
@@ -34,7 +34,7 @@ public class ConfigGroupServiceTest extends BaseServiceTest {
 
   @Override
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     // Get Config Groups
     ConfigGroupService configGroupService = new TestConfigGroupService

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/ConfigurationServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ConfigurationServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ConfigurationServiceTest.java
index 48daba7..adaffff 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ConfigurationServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ConfigurationServiceTest.java
@@ -34,7 +34,7 @@ import 
org.apache.ambari.server.api.services.serializers.ResultSerializer;
 public class ConfigurationServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getConfigurations
     ConfigurationService service = new TestConfigurationService("clusterName");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/CredentialServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/CredentialServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/CredentialServiceTest.java
index 3466cc7..73d3383 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/CredentialServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/CredentialServiceTest.java
@@ -38,7 +38,7 @@ public class CredentialServiceTest extends BaseServiceTest {
 
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getCredential
     CredentialService CredentialService = new TestCredentialService("alias");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/ExtensionsServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ExtensionsServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ExtensionsServiceTest.java
index 6186319..7a696a6 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ExtensionsServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ExtensionsServiceTest.java
@@ -38,7 +38,7 @@ public class ExtensionsServiceTest extends BaseServiceTest {
 
   @Override
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     // getExtension
     ExtensionsService service = new TestExtensionsService("extensionName", 
null);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/FeedServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/FeedServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/FeedServiceTest.java
index 7756453..c899b93 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/FeedServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/FeedServiceTest.java
@@ -39,7 +39,7 @@ public class FeedServiceTest extends BaseServiceTest {
 
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getFeed
     FeedService feedService = new TestFeedService("feedName");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/GroupPrivilegeServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/GroupPrivilegeServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/GroupPrivilegeServiceTest.java
index 995dfaf..89545a5 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/GroupPrivilegeServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/GroupPrivilegeServiceTest.java
@@ -43,7 +43,7 @@ import junit.framework.Assert;
 public class GroupPrivilegeServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     GroupPrivilegeService groupPrivilegeService;
     Method m;
@@ -70,7 +70,7 @@ public class GroupPrivilegeServiceTest extends 
BaseServiceTest {
     final UriInfo uriInfo = EasyMock.createNiceMock(UriInfo.class);
     final GroupPrivilegeService service = new TestGroupPrivilegeService();
 
-    final List<Response> disabledMethods = new ArrayList<Response>();
+    final List<Response> disabledMethods = new ArrayList<>();
     disabledMethods.add(service.createPrivilege("test", headers, uriInfo));
     disabledMethods.add(service.updatePrivilege("test", headers, uriInfo, 
"test"));
     disabledMethods.add(service.updatePrivileges("test", headers, uriInfo));

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/GroupServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/GroupServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/GroupServiceTest.java
index b171ceb..f46d358 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/GroupServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/GroupServiceTest.java
@@ -38,7 +38,7 @@ public class GroupServiceTest extends BaseServiceTest {
 
   @Override
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     GroupService groupService;
     Method m;

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostComponentServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostComponentServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostComponentServiceTest.java
index 9cbed02..01ccd6a 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostComponentServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostComponentServiceTest.java
@@ -38,7 +38,7 @@ import 
org.apache.ambari.server.api.services.serializers.ResultSerializer;
 public class HostComponentServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getHostComponent
     HostComponentService componentService = new 
TestHostComponentService("clusterName", "serviceName", "componentName");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostKerberosIdentityServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostKerberosIdentityServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostKerberosIdentityServiceTest.java
index 7920405..c9200b0 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostKerberosIdentityServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostKerberosIdentityServiceTest.java
@@ -39,7 +39,7 @@ import 
org.apache.ambari.server.api.services.serializers.ResultSerializer;
 public class HostKerberosIdentityServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getComponent
     HostKerberosIdentityService service = new 
TestHostKerberosIdentityService("clusterName", "hostName", "identityId");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostServiceTest.java
index 0dc97bc..6aef04d 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostServiceTest.java
@@ -38,7 +38,7 @@ import 
org.apache.ambari.server.api.services.serializers.ResultSerializer;
 public class HostServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getHost
     HostService service = new TestHostService("clusterName", "hostName");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostStackVersionServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostStackVersionServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostStackVersionServiceTest.java
index 57e4cf1..8367a94 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostStackVersionServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/HostStackVersionServiceTest.java
@@ -37,7 +37,7 @@ import org.apache.ambari.server.controller.spi.Resource.Type;
 public class HostStackVersionServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     HostStackVersionService hostStackVersionService;
     Method m;

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/InstanceServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/InstanceServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/InstanceServiceTest.java
index 86cc3b2..ee42b57 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/InstanceServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/InstanceServiceTest.java
@@ -38,7 +38,7 @@ import 
org.apache.ambari.server.api.services.serializers.ResultSerializer;
 public class InstanceServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getInstance
     InstanceService service = new TestInstanceService("clusterName", 
"instanceName");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/JobServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/JobServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/JobServiceTest.java
index 6e0fa96..128b345 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/JobServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/JobServiceTest.java
@@ -36,7 +36,7 @@ public class JobServiceTest extends BaseServiceTest {
 
   @Override
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     // getJob
     JobService service = new TestJobService("clusterName", "jobId");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/LdapSyncEventServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/LdapSyncEventServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/LdapSyncEventServiceTest.java
index 25939bc..9085bf5 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/LdapSyncEventServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/LdapSyncEventServiceTest.java
@@ -37,7 +37,7 @@ import org.apache.ambari.server.controller.spi.Resource;
 public class LdapSyncEventServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getEvent
     LdapSyncEventService permissionService = new TestLdapSyncEventService();

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/MemberServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/MemberServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/MemberServiceTest.java
index 1e0137e..f9543df 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/MemberServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/MemberServiceTest.java
@@ -37,7 +37,7 @@ import org.apache.ambari.server.controller.spi.Resource.Type;
 public class MemberServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     MemberService memberService;
     Method m;

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/NamedPropertySetTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/NamedPropertySetTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/NamedPropertySetTest.java
index 43e2b2c..7fadeb1 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/NamedPropertySetTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/NamedPropertySetTest.java
@@ -33,7 +33,7 @@ public class NamedPropertySetTest {
 
   @Test
   public void testGetters() {
-    Map<String, Object> mapProps = new HashMap<String, Object>();
+    Map<String, Object> mapProps = new HashMap<>();
     mapProps.put("foo", "bar");
 
     NamedPropertySet propertySet = new NamedPropertySet("foo", mapProps);
@@ -43,7 +43,7 @@ public class NamedPropertySetTest {
 
   @Test
   public void testEquals() {
-    Map<String, Object> mapProps = new HashMap<String, Object>();
+    Map<String, Object> mapProps = new HashMap<>();
     mapProps.put("foo", "bar");
 
     NamedPropertySet propertySet = new NamedPropertySet("foo", mapProps);
@@ -60,7 +60,7 @@ public class NamedPropertySetTest {
 
   @Test
   public void testHashCode() {
-    Map<String, Object> mapProps = new HashMap<String, Object>();
+    Map<String, Object> mapProps = new HashMap<>();
 
     NamedPropertySet propertySet = new NamedPropertySet("foo", mapProps);
     NamedPropertySet propertySet2 = new NamedPropertySet("foo", mapProps);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/PermissionServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/PermissionServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/PermissionServiceTest.java
index 6994513..bbb4578 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/PermissionServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/PermissionServiceTest.java
@@ -38,7 +38,7 @@ import 
org.apache.ambari.server.api.services.serializers.ResultSerializer;
 public class PermissionServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getPermission
     PermissionService service = new TestPermissionService("id");

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