http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/PersistenceManagerImplTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/PersistenceManagerImplTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/PersistenceManagerImplTest.java
index d1f9c90..07c3a90 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/PersistenceManagerImplTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/PersistenceManagerImplTest.java
@@ -120,18 +120,18 @@ public class PersistenceManagerImplTest {
     Request serverRequest = createStrictMock(Request.class);
     RequestBody body = new RequestBody();
 
-    Map<Resource.Type, String> mapResourceIds = new HashMap<Resource.Type, 
String>();
+    Map<Resource.Type, String> mapResourceIds = new HashMap<>();
     mapResourceIds.put(Resource.Type.Cluster, "clusterId");
     mapResourceIds.put(Resource.Type.Service, "serviceId");
 
-    Map<String, Object> mapProperties = new HashMap<String, Object>();
+    Map<String, Object> mapProperties = new HashMap<>();
     mapProperties.put("componentId", "id");
     mapProperties.put(PropertyHelper.getPropertyId("foo", "bar"), "value");
     NamedPropertySet namedPropSet = new NamedPropertySet("", mapProperties);
     body.addPropertySet(namedPropSet);
 
-    Set<Map<String, Object>> setExpected = new HashSet<Map<String, Object>>();
-    Map<String, Object> mapExpected = new HashMap<String, 
Object>(mapProperties);
+    Set<Map<String, Object>> setExpected = new HashSet<>();
+    Map<String, Object> mapExpected = new HashMap<>(mapProperties);
     mapExpected.put(clusterId, "clusterId");
     mapExpected.put(serviceId, "serviceId");
     setExpected.add(mapExpected);
@@ -164,13 +164,13 @@ public class PersistenceManagerImplTest {
     Request serverRequest = createStrictMock(Request.class);
     RequestBody body = new RequestBody();
 
-    Map<Resource.Type, String> mapResourceIds = new HashMap<Resource.Type, 
String>();
+    Map<Resource.Type, String> mapResourceIds = new HashMap<>();
     mapResourceIds.put(Resource.Type.Cluster, "clusterId");
     mapResourceIds.put(Resource.Type.Service, "serviceId");
     mapResourceIds.put(Resource.Type.Component, "componentId");
 
-    Set<Map<String, Object>> setExpected = new HashSet<Map<String, Object>>();
-    Map<String, Object> mapExpected = new HashMap<String, Object>();
+    Set<Map<String, Object>> setExpected = new HashSet<>();
+    Map<String, Object> mapExpected = new HashMap<>();
     mapExpected.put(clusterId, "clusterId");
     mapExpected.put(serviceId, "serviceId");
     mapExpected.put(componentId, "componentId");
@@ -204,15 +204,15 @@ public class PersistenceManagerImplTest {
     String clusterId = "clusterId";
     String serviceId = "serviceId";
 
-    Map<Resource.Type, String> mapResourceIds = new HashMap<Resource.Type, 
String>();
+    Map<Resource.Type, String> mapResourceIds = new HashMap<>();
     mapResourceIds.put(Resource.Type.Cluster, "clusterId");
     mapResourceIds.put(Resource.Type.Service, "serviceId");
 
-    Map<String, Object> mapResourceProps1 = new HashMap<String, Object>();
+    Map<String, Object> mapResourceProps1 = new HashMap<>();
     mapResourceProps1.put("componentId", "id1");
     mapResourceProps1.put(PropertyHelper.getPropertyId("foo", "bar"), "value");
 
-    Map<String, Object> mapResourceProps2 = new HashMap<String, Object>();
+    Map<String, Object> mapResourceProps2 = new HashMap<>();
     mapResourceProps1.put("componentId", "id2");
     mapResourceProps2.put(PropertyHelper.getPropertyId("foo", "bar2"), 
"value2");
 
@@ -222,12 +222,12 @@ public class PersistenceManagerImplTest {
     body.addPropertySet(namedPropSet1);
     body.addPropertySet(namedPropSet2);
 
-    Set<Map<String, Object>> setExpected = new HashSet<Map<String, Object>>();
-    Map<String, Object> mapExpected1 = new HashMap<String, 
Object>(mapResourceProps1);
+    Set<Map<String, Object>> setExpected = new HashSet<>();
+    Map<String, Object> mapExpected1 = new HashMap<>(mapResourceProps1);
     mapExpected1.put(clusterId, "clusterId");
     mapExpected1.put(serviceId, "serviceId");
     setExpected.add(mapExpected1);
-    Map<String, Object> mapExpected2 = new HashMap<String, 
Object>(mapResourceProps2);
+    Map<String, Object> mapExpected2 = new HashMap<>(mapResourceProps2);
     mapExpected2.put(clusterId, "clusterId");
     mapExpected2.put(serviceId, "serviceId");
     setExpected.add(mapExpected2);
@@ -264,16 +264,16 @@ public class PersistenceManagerImplTest {
     // because the value is not set in the request
     String serviceId = null;
 
-    Map<Resource.Type, String> mapResourceIds = new HashMap<Resource.Type, 
String>();
+    Map<Resource.Type, String> mapResourceIds = new HashMap<>();
     mapResourceIds.put(Resource.Type.Cluster, clusterId);
     mapResourceIds.put(Resource.Type.Service, serviceId);
 
-    Map<String, Object> mapProperties = new HashMap<String, Object>();
+    Map<String, Object> mapProperties = new HashMap<>();
     mapProperties.put(PropertyHelper.getPropertyId("foo", "bar"), "value");
     NamedPropertySet namedPropSet = new NamedPropertySet("", mapProperties);
     body.addPropertySet(namedPropSet);
 
-    Set<Map<String, Object>> setExpected = new HashSet<Map<String, Object>>();
+    Set<Map<String, Object>> setExpected = new HashSet<>();
     setExpected.add(mapProperties);
 
     //expectations

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/PreUpgradeCheckServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/PreUpgradeCheckServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/PreUpgradeCheckServiceTest.java
index 06673ea..23c99d9 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/PreUpgradeCheckServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/PreUpgradeCheckServiceTest.java
@@ -38,7 +38,7 @@ public class PreUpgradeCheckServiceTest extends 
BaseServiceTest {
 
   @Override
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     PreUpgradeCheckService 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/PrivilegeServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/PrivilegeServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/PrivilegeServiceTest.java
index c93b1ce..134c753 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/PrivilegeServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/PrivilegeServiceTest.java
@@ -39,7 +39,7 @@ public class PrivilegeServiceTest extends BaseServiceTest {
 
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getPrivilege
     PrivilegeService service = new TestPrivilegeService("id");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/RecommendationServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/RecommendationServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/RecommendationServiceTest.java
index a1a0908..779a320 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/RecommendationServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/RecommendationServiceTest.java
@@ -38,7 +38,7 @@ public class RecommendationServiceTest extends 
BaseServiceTest {
 
   @Override
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getRecommendation
     RecommendationService service = new TestRecommendationService("stackName", 
"stackVersion");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/RepositoryServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/RepositoryServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/RepositoryServiceTest.java
index e47c1aa..6d6ba7b 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/RepositoryServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/RepositoryServiceTest.java
@@ -39,7 +39,7 @@ public class RepositoryServiceTest extends BaseServiceTest {
 
   @Override
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     RepositoryService 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/RequestFactoryTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/RequestFactoryTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/RequestFactoryTest.java
index 5b7d29d..8390202 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/RequestFactoryTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/RequestFactoryTest.java
@@ -81,7 +81,7 @@ public class RequestFactoryTest {
     ResourceDefinition resourceDefinition = 
createNiceMock(ResourceDefinition.class);
     @SuppressWarnings("unchecked")
     MultivaluedMap<String, String> mapQueryParams = 
createMock(MultivaluedMap.class);
-    Map<String, List<String>> mapProps = new HashMap<String, List<String>>();
+    Map<String, List<String>> mapProps = new HashMap<>();
     mapProps.put("foo", Collections.singletonList("bar"));
 
 
@@ -116,10 +116,10 @@ public class RequestFactoryTest {
 
     @SuppressWarnings("unchecked")
     MultivaluedMap<String, String> mapQueryParams = 
createMock(MultivaluedMap.class);
-    Map<String, List<String>> mapProps = new HashMap<String, List<String>>();
+    Map<String, List<String>> mapProps = new HashMap<>();
     mapProps.put("foo", Collections.singletonList("bar"));
 
-    Map<String, String> requestInfoMap = new HashMap<String, String>();
+    Map<String, String> requestInfoMap = new HashMap<>();
 
     //expectations
     expect(uriInfo.getQueryParameters()).andReturn(mapQueryParams).anyTimes();
@@ -154,10 +154,10 @@ public class RequestFactoryTest {
 
     @SuppressWarnings("unchecked")
     MultivaluedMap<String, String> mapQueryParams = 
createMock(MultivaluedMap.class);
-    Map<String, List<String>> mapProps = new HashMap<String, List<String>>();
+    Map<String, List<String>> mapProps = new HashMap<>();
     mapProps.put("foo", Collections.singletonList("bar"));
 
-    Map<String, String> requestInfoMap = new HashMap<String, String>();
+    Map<String, String> requestInfoMap = new HashMap<>();
 
     //expectations
     expect(uriInfo.getQueryParameters()).andReturn(mapQueryParams).anyTimes();
@@ -298,10 +298,10 @@ public class RequestFactoryTest {
 
     @SuppressWarnings("unchecked")
     MultivaluedMap<String, String> mapQueryParams = 
createMock(MultivaluedMap.class);
-    Map<String, List<String>> mapProps = new HashMap<String, List<String>>();
+    Map<String, List<String>> mapProps = new HashMap<>();
     mapProps.put("foo", Collections.singletonList("bar"));
 
-    Map<String, String> requestInfoMap = new HashMap<String, String>();
+    Map<String, String> requestInfoMap = new HashMap<>();
 
     //expectations
     expect(uriInfo.getQueryParameters()).andReturn(mapQueryParams).anyTimes();
@@ -336,10 +336,10 @@ public class RequestFactoryTest {
 
     @SuppressWarnings("unchecked")
     MultivaluedMap<String, String> mapQueryParams = 
createMock(MultivaluedMap.class);
-    Map<String, List<String>> mapProps = new HashMap<String, List<String>>();
+    Map<String, List<String>> mapProps = new HashMap<>();
     mapProps.put("foo", Collections.singletonList("bar"));
 
-    Map<String, String> requestInfoMap = new HashMap<String, String>();
+    Map<String, String> requestInfoMap = new HashMap<>();
 
     //expectations
     expect(uriInfo.getQueryParameters()).andReturn(mapQueryParams).anyTimes();

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/RoleAuthorizationServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/RoleAuthorizationServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/RoleAuthorizationServiceTest.java
index 7dcb180..517a6a0 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/RoleAuthorizationServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/RoleAuthorizationServiceTest.java
@@ -38,7 +38,7 @@ import 
org.apache.ambari.server.api.services.serializers.ResultSerializer;
 public class RoleAuthorizationServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getAuthorization
     RoleAuthorizationService service = new TestRoleAuthorizationService("id");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/RootServiceServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/RootServiceServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/RootServiceServiceTest.java
index 310d69f..64898c8 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/RootServiceServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/RootServiceServiceTest.java
@@ -38,7 +38,7 @@ public class RootServiceServiceTest extends BaseServiceTest {
 
   @Override
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
     
     //getServices
     RootServiceService service = new TestRootServiceService(null, null, null);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/ServiceServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ServiceServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ServiceServiceTest.java
index b1b2ba2..deda3eb 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ServiceServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ServiceServiceTest.java
@@ -37,7 +37,7 @@ import 
org.apache.ambari.server.api.services.serializers.ResultSerializer;
 public class ServiceServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getService
     ServiceService service = new TestServiceService("clusterName", 
"serviceName");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/StacksServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/StacksServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/StacksServiceTest.java
index a6bafcc..ff62712 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/StacksServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/StacksServiceTest.java
@@ -38,7 +38,7 @@ public class StacksServiceTest extends BaseServiceTest {
 
   @Override
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     // getStack
     StacksService service = new TestStacksService("stackName", null);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/TargetClusterServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/TargetClusterServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/TargetClusterServiceTest.java
index 1f8b7bd..a71b062 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/TargetClusterServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/TargetClusterServiceTest.java
@@ -39,7 +39,7 @@ public class TargetClusterServiceTest extends BaseServiceTest 
{
 
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getTargetCluster
     TargetClusterService targetClusterService = new 
TestTargetClusterService("targetClusterName");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/TaskAttemptServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/TaskAttemptServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/TaskAttemptServiceTest.java
index 91a893a..072cd65 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/TaskAttemptServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/TaskAttemptServiceTest.java
@@ -36,7 +36,7 @@ public class TaskAttemptServiceTest extends BaseServiceTest {
 
   @Override
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     // getTaskAttempt
     TestTaskAttemptService service = new TestTaskAttemptService("clusterName",

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/UpgradeItemServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/UpgradeItemServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/UpgradeItemServiceTest.java
index 15f23f0..25f67a4 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/UpgradeItemServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/UpgradeItemServiceTest.java
@@ -35,7 +35,7 @@ import org.junit.Assert;
  */
 public class UpgradeItemServiceTest extends BaseServiceTest {
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //updateServices
     UpgradeItemService service = new TestUpgradeItemService("clusterName", 
"upgradeId", "upgradeGroupId", 99L);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/UserAuthorizationServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/UserAuthorizationServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/UserAuthorizationServiceTest.java
index 8a2f799..c0fb6ff 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/UserAuthorizationServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/UserAuthorizationServiceTest.java
@@ -40,7 +40,7 @@ import org.junit.Test;
 public class UserAuthorizationServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getAuthorization
     UserAuthorizationService service = new TestUserAuthorizationService("id");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/UserPrivilegeServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/UserPrivilegeServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/UserPrivilegeServiceTest.java
index 7b0e06d..909a4ba 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/UserPrivilegeServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/UserPrivilegeServiceTest.java
@@ -46,7 +46,7 @@ import junit.framework.Assert;
 public class UserPrivilegeServiceTest extends BaseServiceTest {
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     UserPrivilegeService userPrivilegeService;
     Method m;
@@ -73,7 +73,7 @@ public class UserPrivilegeServiceTest extends BaseServiceTest 
{
     final UriInfo uriInfo = EasyMock.createNiceMock(UriInfo.class);
     final UserPrivilegeService service = new TestUserPrivilegeService();
 
-    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/ValidationServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ValidationServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ValidationServiceTest.java
index aec68e6..722e4bc 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ValidationServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ValidationServiceTest.java
@@ -38,7 +38,7 @@ public class ValidationServiceTest extends BaseServiceTest {
 
   @Override
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getValidation
     ValidationService service = new TestValidationService("stackName", 
"stackVersion");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/ViewPermissionServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ViewPermissionServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ViewPermissionServiceTest.java
index 7f58fb2..1c9e589 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ViewPermissionServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ViewPermissionServiceTest.java
@@ -38,7 +38,7 @@ public class ViewPermissionServiceTest extends 
BaseServiceTest {
 
 
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     //getPermission
     ViewPermissionService permissionService = new 
TestViewPermissionService("MY_VIEW", "1.0", "permissionName");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/ViewSubResourceServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ViewSubResourceServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ViewSubResourceServiceTest.java
index 9499466..97943df 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/ViewSubResourceServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/ViewSubResourceServiceTest.java
@@ -56,7 +56,7 @@ public class ViewSubResourceServiceTest extends 
BaseServiceTest {
 
   @Override
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     ViewInstanceEntity viewInstanceEntity = 
ViewInstanceEntityTest.getViewInstanceEntity();
 
@@ -107,11 +107,11 @@ public class ViewSubResourceServiceTest extends 
BaseServiceTest {
     child.setProperty("href", "this is an href");
 
     // resource properties
-    Map<String, Object> mapRootProps = new LinkedHashMap<String, Object>();
+    Map<String, Object> mapRootProps = new LinkedHashMap<>();
     mapRootProps.put("prop2", "value2");
     mapRootProps.put("prop1", "value1");
 
-    Map<String, Object> mapCategoryProps = new LinkedHashMap<String, Object>();
+    Map<String, Object> mapCategoryProps = new LinkedHashMap<>();
     mapCategoryProps.put("catProp1", "catValue1");
     mapCategoryProps.put("catProp2", "catValue2");
 
@@ -165,15 +165,15 @@ public class ViewSubResourceServiceTest extends 
BaseServiceTest {
     child.setProperty("href", "this is an href");
 
     // resource properties
-    HashMap<String, Object> mapRootProps = new HashMap<String, Object>();
+    HashMap<String, Object> mapRootProps = new HashMap<>();
     mapRootProps.put("prop1", "value1");
     mapRootProps.put("prop2", "value2");
 
-    HashMap<String, Object> mapCategoryProps = new HashMap<String, Object>();
+    HashMap<String, Object> mapCategoryProps = new HashMap<>();
     mapCategoryProps.put("catProp1", "catValue1");
     mapCategoryProps.put("catProp2", "catValue2");
 
-    Map<String, Map<String, Object>> propertyMap = new HashMap<String, 
Map<String, Object>>();
+    Map<String, Map<String, Object>> propertyMap = new HashMap<>();
 
     propertyMap.put(null, mapRootProps);
     propertyMap.put("category", mapCategoryProps);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/WorkflowServiceTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/WorkflowServiceTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/WorkflowServiceTest.java
index 9969e59..b9cc545 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/WorkflowServiceTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/WorkflowServiceTest.java
@@ -36,7 +36,7 @@ public class WorkflowServiceTest extends BaseServiceTest {
 
   @Override
   public List<ServiceTestInvocation> getTestInvocations() throws Exception {
-    List<ServiceTestInvocation> listInvocations = new 
ArrayList<ServiceTestInvocation>();
+    List<ServiceTestInvocation> listInvocations = new ArrayList<>();
 
     // getWorkflow
     WorkflowService service = new TestWorkflowService("clusterName");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/parsers/JsonRequestBodyParserTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/parsers/JsonRequestBodyParserTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/parsers/JsonRequestBodyParserTest.java
index 548644b..6952de1 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/parsers/JsonRequestBodyParserTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/parsers/JsonRequestBodyParserTest.java
@@ -162,7 +162,7 @@ public class JsonRequestBodyParserTest {
     Set<NamedPropertySet> setProps = body.getNamedPropertySets();
     assertEquals(1, setProps.size());
 
-    Map<String, Object> mapExpected = new HashMap<String, Object>();
+    Map<String, Object> mapExpected = new HashMap<>();
     mapExpected.put(PropertyHelper.getPropertyId("Services", "service_name"), 
"HDFS");
     mapExpected.put(PropertyHelper.getPropertyId("Services", "display_name"), 
"HDFS");
     mapExpected.put(PropertyHelper.getPropertyId("ServiceInfo", 
"cluster_name"), "tbmetrictest");
@@ -237,15 +237,15 @@ public class JsonRequestBodyParserTest {
     boolean cluster2Matches = false;
     boolean cluster3Matches = false;
 
-    Map<String, String> mapCluster1 = new HashMap<String, String>();
+    Map<String, String> mapCluster1 = new HashMap<>();
     mapCluster1.put(PropertyHelper.getPropertyId("Clusters", "cluster_name"), 
"unitTestCluster1");
 
-    Map<String, String> mapCluster2 = new HashMap<String, String>();
+    Map<String, String> mapCluster2 = new HashMap<>();
     mapCluster2.put(PropertyHelper.getPropertyId("Clusters", "cluster_name"), 
"unitTestCluster2");
     mapCluster2.put(PropertyHelper.getPropertyId("Clusters", "property1"), 
"prop1Value");
 
 
-    Map<String, String> mapCluster3 = new HashMap<String, String>();
+    Map<String, String> mapCluster3 = new HashMap<>();
     mapCluster3.put(PropertyHelper.getPropertyId("Clusters", "cluster_name"), 
"unitTestCluster3");
     mapCluster3.put(PropertyHelper.getPropertyId("Clusters/Category", 
"property2"), null);
 
@@ -289,15 +289,15 @@ public class JsonRequestBodyParserTest {
     boolean cluster2Matches = false;
     boolean cluster3Matches = false;
 
-    Map<String, String> mapCluster1 = new HashMap<String, String>();
+    Map<String, String> mapCluster1 = new HashMap<>();
     mapCluster1.put(PropertyHelper.getPropertyId("Clusters", "cluster_name"), 
"unitTestCluster1");
 
-    Map<String, String> mapCluster2 = new HashMap<String, String>();
+    Map<String, String> mapCluster2 = new HashMap<>();
     mapCluster2.put(PropertyHelper.getPropertyId("Clusters", "cluster_name"), 
"unitTestCluster2");
     mapCluster2.put(PropertyHelper.getPropertyId("Clusters", "property1"), 
"prop1Value");
 
 
-    Map<String, String> mapCluster3 = new HashMap<String, String>();
+    Map<String, String> mapCluster3 = new HashMap<>();
     mapCluster3.put(PropertyHelper.getPropertyId("Clusters", "cluster_name"), 
"unitTestCluster3");
     mapCluster3.put(PropertyHelper.getPropertyId("Clusters/Category", 
"property2"), "prop2Value");
 
@@ -335,7 +335,7 @@ public class JsonRequestBodyParserTest {
     Set<NamedPropertySet> setProps = body.getNamedPropertySets();
     assertEquals(1, setProps.size());
 
-    Map<String, Object> mapExpected = new HashMap<String, Object>();
+    Map<String, Object> mapExpected = new HashMap<>();
     mapExpected.put(PropertyHelper.getPropertyId("Services", "service_name"), 
"HDFS");
     mapExpected.put(PropertyHelper.getPropertyId("Services", "display_name"), 
"HDFS");
     mapExpected.put(PropertyHelper.getPropertyId("ServiceInfo", 
"cluster_name"), "tbmetrictest");
@@ -544,7 +544,7 @@ public class JsonRequestBodyParserTest {
     Set<NamedPropertySet> setProps = body.getNamedPropertySets();
     assertEquals(1, setProps.size());
 
-    Map<String, Object> mapExpected = new HashMap<String, Object>();
+    Map<String, Object> mapExpected = new HashMap<>();
     mapExpected.put(PropertyHelper.getPropertyId("Services", "service_name"), 
"HDFS");
     mapExpected.put(PropertyHelper.getPropertyId("Services", "display_name"), 
"HDFS");
     mapExpected.put(PropertyHelper.getPropertyId("ServiceInfo", 
"cluster_name"), "tbmetrictest");
@@ -596,7 +596,7 @@ public class JsonRequestBodyParserTest {
     Assert.assertNotNull(requestBlob);
     body = parser.parse(requestBlob).iterator().next();
 
-    Map<String, Object> mapExpected = new HashMap<String, Object>();
+    Map<String, Object> mapExpected = new HashMap<>();
     mapExpected.put(PropertyHelper.getPropertyId("Services", "service_name"), 
"HDFS");
     mapExpected.put(PropertyHelper.getPropertyId("Services", "display_name"), 
"HDFS");
     mapExpected.put(PropertyHelper.getPropertyId("ServiceInfo", 
"cluster_name"), "tbmetrictest");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/serializers/JsonSerializerTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/serializers/JsonSerializerTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/serializers/JsonSerializerTest.java
index 533b897..a3248c0 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/serializers/JsonSerializerTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/serializers/JsonSerializerTest.java
@@ -62,11 +62,11 @@ public class JsonSerializerTest {
     mapRootProps.put("prop2", "value2");
     mapRootProps.put("prop1", "value1");
 
-    Map<String, Object> mapCategoryProps = new LinkedHashMap<String, Object>();
+    Map<String, Object> mapCategoryProps = new LinkedHashMap<>();
     mapCategoryProps.put("catProp1", "catValue1");
     mapCategoryProps.put("catProp2", "catValue2");
 
-    Map<String, Map<String, Object>> propertyMap = new LinkedHashMap<String, 
Map<String, Object>>();
+    Map<String, Map<String, Object>> propertyMap = new LinkedHashMap<>();
 
     propertyMap.put(null, mapRootProps);
     propertyMap.put("category", mapCategoryProps);
@@ -112,15 +112,15 @@ public class JsonSerializerTest {
     resourcesNode.addChild(resource, "resource1");
 
     // resource properties
-    Map<String, Object> mapRootProps = new LinkedHashMap<String, Object>();
+    Map<String, Object> mapRootProps = new LinkedHashMap<>();
     mapRootProps.put("prop2", "value2");
     mapRootProps.put("prop1", "value1");
 
-    Map<String, Object> mapCategoryProps = new LinkedHashMap<String, Object>();
+    Map<String, Object> mapCategoryProps = new LinkedHashMap<>();
     mapCategoryProps.put("catProp1", "catValue1");
     mapCategoryProps.put("catProp2", "catValue2");
 
-    Map<String, Map<String, Object>> propertyMap = new LinkedHashMap<String, 
Map<String, Object>>();
+    Map<String, Map<String, Object>> propertyMap = new LinkedHashMap<>();
 
     propertyMap.put(null, mapRootProps);
     propertyMap.put("category", mapCategoryProps);
@@ -168,15 +168,15 @@ public class JsonSerializerTest {
     //child.addChild(resource2, "sub-resource");
 
     // resource properties
-    Map<String, Object> mapRootProps = new LinkedHashMap<String, Object>();
+    Map<String, Object> mapRootProps = new LinkedHashMap<>();
     mapRootProps.put("prop2", "value2");
     mapRootProps.put("prop1", "value1");
 
-    Map<String, Object> mapCategoryProps = new LinkedHashMap<String, Object>();
+    Map<String, Object> mapCategoryProps = new LinkedHashMap<>();
     mapCategoryProps.put("catProp1", "catValue1");
     mapCategoryProps.put("catProp2", "catValue2");
 
-    Map<String, Map<String, Object>> propertyMap = new LinkedHashMap<String, 
Map<String, Object>>();
+    Map<String, Map<String, Object>> propertyMap = new LinkedHashMap<>();
 
     propertyMap.put(null, mapRootProps);
     propertyMap.put("category", mapCategoryProps);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/stackadvisor/StackAdvisorBlueprintProcessorTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/stackadvisor/StackAdvisorBlueprintProcessorTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/stackadvisor/StackAdvisorBlueprintProcessorTest.java
index 6c912d4..49f070a 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/stackadvisor/StackAdvisorBlueprintProcessorTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/stackadvisor/StackAdvisorBlueprintProcessorTest.java
@@ -74,7 +74,7 @@ public class StackAdvisorBlueprintProcessorTest {
   public void testAdviseConfiguration() throws StackAdvisorException, 
ConfigurationTopologyException {
     // GIVEN
     Map<String, Map<String, String>> props = createProps();
-    Map<String, AdvisedConfiguration> advisedConfigurations = new 
HashMap<String, AdvisedConfiguration>();
+    Map<String, AdvisedConfiguration> advisedConfigurations = new HashMap<>();
     expect(clusterTopology.getBlueprint()).andReturn(blueprint).anyTimes();
     
expect(clusterTopology.getHostGroupInfo()).andReturn(createHostGroupInfo()).anyTimes();
     
expect(clusterTopology.getAdvisedConfigurations()).andReturn(advisedConfigurations).anyTimes();
@@ -108,7 +108,7 @@ public class StackAdvisorBlueprintProcessorTest {
   public void testAdviseConfigurationWithOnlyStackDefaultsApply() throws 
StackAdvisorException, ConfigurationTopologyException {
     // GIVEN
     Map<String, Map<String, String>> props = createProps();
-    Map<String, AdvisedConfiguration> advisedConfigurations = new 
HashMap<String, AdvisedConfiguration>();
+    Map<String, AdvisedConfiguration> advisedConfigurations = new HashMap<>();
     expect(clusterTopology.getBlueprint()).andReturn(blueprint).anyTimes();
     
expect(clusterTopology.getHostGroupInfo()).andReturn(createHostGroupInfo()).anyTimes();
     
expect(clusterTopology.getAdvisedConfigurations()).andReturn(advisedConfigurations).anyTimes();
@@ -143,7 +143,7 @@ public class StackAdvisorBlueprintProcessorTest {
     // GIVEN
     Map<String, Map<String, String>> props = createProps();
     props.get("core-site").put("dummyKey3", "stackDefaultValue");
-    Map<String, AdvisedConfiguration> advisedConfigurations = new 
HashMap<String, AdvisedConfiguration>();
+    Map<String, AdvisedConfiguration> advisedConfigurations = new HashMap<>();
     expect(clusterTopology.getBlueprint()).andReturn(blueprint).anyTimes();
     
expect(clusterTopology.getHostGroupInfo()).andReturn(createHostGroupInfo()).anyTimes();
     
expect(clusterTopology.getAdvisedConfigurations()).andReturn(advisedConfigurations).anyTimes();
@@ -178,7 +178,7 @@ public class StackAdvisorBlueprintProcessorTest {
     ConfigurationTopologyException {
     // GIVEN
     Map<String, Map<String, String>> props = createProps();
-    Map<String, AdvisedConfiguration> advisedConfigurations = new 
HashMap<String, AdvisedConfiguration>();
+    Map<String, AdvisedConfiguration> advisedConfigurations = new HashMap<>();
     expect(clusterTopology.getBlueprint()).andReturn(blueprint).anyTimes();
     
expect(clusterTopology.getHostGroupInfo()).andReturn(createHostGroupInfo()).anyTimes();
     
expect(clusterTopology.getAdvisedConfigurations()).andReturn(advisedConfigurations).anyTimes();
@@ -210,7 +210,7 @@ public class StackAdvisorBlueprintProcessorTest {
   public void testAdviseConfigurationWhenConfigurationRecommendFails() throws 
StackAdvisorException, ConfigurationTopologyException {
     // GIVEN
     Map<String, Map<String, String>> props = createProps();
-    Map<String, AdvisedConfiguration> advisedConfigurations = new 
HashMap<String, AdvisedConfiguration>();
+    Map<String, AdvisedConfiguration> advisedConfigurations = new HashMap<>();
     expect(clusterTopology.getBlueprint()).andReturn(blueprint).anyTimes();
     
expect(clusterTopology.getHostGroupInfo()).andReturn(createHostGroupInfo()).anyTimes();
     
expect(clusterTopology.getAdvisedConfigurations()).andReturn(advisedConfigurations).anyTimes();
@@ -239,7 +239,7 @@ public class StackAdvisorBlueprintProcessorTest {
   public void 
testAdviseConfigurationWhenConfigurationRecommendHasInvalidResponse() throws 
StackAdvisorException, ConfigurationTopologyException {
     // GIVEN
     Map<String, Map<String, String>> props = createProps();
-    Map<String, AdvisedConfiguration> advisedConfigurations = new 
HashMap<String, AdvisedConfiguration>();
+    Map<String, AdvisedConfiguration> advisedConfigurations = new HashMap<>();
     expect(clusterTopology.getBlueprint()).andReturn(blueprint).anyTimes();
     
expect(clusterTopology.getHostGroupInfo()).andReturn(createHostGroupInfo()).anyTimes();
     
expect(clusterTopology.getAdvisedConfigurations()).andReturn(advisedConfigurations).anyTimes();
@@ -282,7 +282,7 @@ public class StackAdvisorBlueprintProcessorTest {
   }
 
   private Map<String, HostGroupInfo> createHostGroupInfo() {
-    Map<String, HostGroupInfo> hostGroupInfoMap = new HashMap<String, 
HostGroupInfo>();
+    Map<String, HostGroupInfo> hostGroupInfoMap = new HashMap<>();
     HostGroupInfo hgi1 = new HostGroupInfo("hostGroup1");
     HostGroupInfo hgi2 = new HostGroupInfo("hostGroup2");
     hostGroupInfoMap.put("hg1", hgi1);
@@ -292,13 +292,13 @@ public class StackAdvisorBlueprintProcessorTest {
 
   private Configuration createStackDefaults() {
     Map<String, Map<String, String>> stackDefaultProps =
-      new HashMap<String, Map<String, String>>();
-    Map<String, String> coreSiteDefault = new HashMap<String, String>();
+      new HashMap<>();
+    Map<String, String> coreSiteDefault = new HashMap<>();
     coreSiteDefault.put("dummyKey3", "stackDefaultValue");
     stackDefaultProps.put("core-site", coreSiteDefault);
 
     Map<String, Map<String, Map<String, String>>> stackDefaultAttributes =
-      new HashMap<String, Map<String, Map<String, String>>>();
+      new HashMap<>();
     return new Configuration(stackDefaultProps, stackDefaultAttributes);
   }
 
@@ -307,14 +307,14 @@ public class StackAdvisorBlueprintProcessorTest {
     RecommendationResponse.Recommendation recommendations = new 
RecommendationResponse.Recommendation();
     RecommendationResponse.Blueprint blueprint = new 
RecommendationResponse.Blueprint();
     Map<String, RecommendationResponse.BlueprintConfigurations> 
blueprintConfigurationsMap =
-      new HashMap<String, RecommendationResponse.BlueprintConfigurations>();
+      new HashMap<>();
     RecommendationResponse.BlueprintConfigurations blueprintConfig =
       new RecommendationResponse.BlueprintConfigurations();
-    Map<String, String> properties = new HashMap<String, String>();
+    Map<String, String> properties = new HashMap<>();
     properties.put("dummyKey1", "dummyValue");
     properties.put("dummyKey3", "dummyValue-override");
     blueprintConfig.setProperties(properties);
-    Map<String, ValueAttributesInfo> propAttributes = new HashMap<String, 
ValueAttributesInfo>();
+    Map<String, ValueAttributesInfo> propAttributes = new HashMap<>();
     ValueAttributesInfo valueAttributesInfo1 = new ValueAttributesInfo();
     ValueAttributesInfo valueAttributesInfo2 = new ValueAttributesInfo();
     valueAttributesInfo1.setDelete("true");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/api/services/stackadvisor/commands/ConfigurationRecommendationCommandTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/stackadvisor/commands/ConfigurationRecommendationCommandTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/stackadvisor/commands/ConfigurationRecommendationCommandTest.java
index 172fc6c..8f608aa 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/api/services/stackadvisor/commands/ConfigurationRecommendationCommandTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/api/services/stackadvisor/commands/ConfigurationRecommendationCommandTest.java
@@ -46,13 +46,13 @@ public class ConfigurationRecommendationCommandTest {
     ConfigurationRecommendationCommand command = new 
ConfigurationRecommendationCommand(file, "1w", "script", 1, saRunner, metaInfo);
 
     StackAdvisorRequest request = mock(StackAdvisorRequest.class);
-    Map<String, Set<String>> componentHostGroupMap = new HashMap<String, 
Set<String>>();
-    Set<String> components1 = new HashSet<String>();
+    Map<String, Set<String>> componentHostGroupMap = new HashMap<>();
+    Set<String> components1 = new HashSet<>();
     components1.add("component1");
     components1.add("component4");
     components1.add("component5");
     componentHostGroupMap.put("group1", components1);
-    Set<String> components2 = new HashSet<String>();
+    Set<String> components2 = new HashSet<>();
     components2.add("component2");
     components2.add("component3");
     componentHostGroupMap.put("group2", components2);
@@ -62,7 +62,7 @@ public class ConfigurationRecommendationCommandTest {
     assertNotNull(hostGroups);
     assertEquals(2, hostGroups.size());
     Map<String, RecommendationResponse.HostGroup> hostGroupMap =
-        new HashMap<String, RecommendationResponse.HostGroup>();
+      new HashMap<>();
     for (RecommendationResponse.HostGroup hostGroup : hostGroups) {
       hostGroupMap.put(hostGroup.getName(), hostGroup);
     }
@@ -71,7 +71,7 @@ public class ConfigurationRecommendationCommandTest {
     Set<Map<String, String>> host1Components = hostGroup1.getComponents();
     assertNotNull(host1Components);
     assertEquals(3, host1Components.size());
-    Set<String> componentNames1 = new HashSet<String>();
+    Set<String> componentNames1 = new HashSet<>();
     for (Map<String, String> host1Component : host1Components) {
       assertNotNull(host1Component);
       assertEquals(1, host1Component.size());
@@ -88,7 +88,7 @@ public class ConfigurationRecommendationCommandTest {
     Set<Map<String, String>> host2Components = hostGroup2.getComponents();
     assertNotNull(host2Components);
     assertEquals(2, host2Components.size());
-    Set<String> componentNames2 = new HashSet<String>();
+    Set<String> componentNames2 = new HashSet<>();
     for (Map<String, String> host2Component : host2Components) {
       assertNotNull(host2Component);
       assertEquals(1, host2Component.size());

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/audit/request/AllPostAndPutCreator.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/audit/request/AllPostAndPutCreator.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/audit/request/AllPostAndPutCreator.java
index 45aa1df..06790b6 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/audit/request/AllPostAndPutCreator.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/audit/request/AllPostAndPutCreator.java
@@ -30,7 +30,7 @@ public class AllPostAndPutCreator extends AbstractBaseCreator 
{
 
   @Override
   public Set<Request.Type> getRequestTypes() {
-    return new HashSet<Request.Type>(Arrays.asList(Request.Type.POST, 
Request.Type.PUT));
+    return new HashSet<>(Arrays.asList(Request.Type.POST, Request.Type.PUT));
   }
 
   @Override

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/audit/request/creator/RequestEventCreatorTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/audit/request/creator/RequestEventCreatorTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/audit/request/creator/RequestEventCreatorTest.java
index 5cf4aef..3678f81 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/audit/request/creator/RequestEventCreatorTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/audit/request/creator/RequestEventCreatorTest.java
@@ -63,7 +63,7 @@ public class RequestEventCreatorTest extends 
AuditEventCreatorTestBase{
     Result result = AuditEventCreatorTestHelper.createResult(new 
ResultStatus(ResultStatus.STATUS.OK));
     request.getBody().addRequestInfoProperty("command", "MyCommand");
 
-    Map<String, Object> mapProperties = new HashMap<String, Object>();
+    Map<String, Object> mapProperties = new HashMap<>();
     
mapProperties.put(RequestResourceProvider.REQUEST_CLUSTER_NAME_PROPERTY_ID, 
"mycluster");
     NamedPropertySet namedPropSet = new NamedPropertySet("", mapProperties);
     request.getBody().addPropertySet(namedPropSet);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/bootstrap/BootStrapTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/bootstrap/BootStrapTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/bootstrap/BootStrapTest.java
index 3299b63..b0ee302 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/bootstrap/BootStrapTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/bootstrap/BootStrapTest.java
@@ -85,7 +85,7 @@ public class BootStrapTest extends TestCase {
     impl.init();
     SshHostInfo info = new SshHostInfo();
     info.setSshKey("xyz");
-    ArrayList<String> hosts = new ArrayList<String>();
+    ArrayList<String> hosts = new ArrayList<>();
     hosts.add("host1");
     hosts.add("host2");
     info.setUserRunAs("root");
@@ -161,7 +161,7 @@ public class BootStrapTest extends TestCase {
     impl.init();
     SshHostInfo info = new SshHostInfo();
     info.setSshKey("xyz");
-    ArrayList<String> hosts = new ArrayList<String>();
+    ArrayList<String> hosts = new ArrayList<>();
     hosts.add("host1");
     hosts.add("host2");
     info.setHosts(hosts);
@@ -212,7 +212,7 @@ public class BootStrapTest extends TestCase {
     FileUtils.writeStringToFile(new File(tmpFolder, "host2.done"), "1");
     FileUtils.writeStringToFile(new File(tmpFolder, "host2.log"), "err_log_2");
 
-    List<String> listHosts = new ArrayList<String>();
+    List<String> listHosts = new ArrayList<>();
     listHosts.add("host1");
     listHosts.add("host2");
     BSHostStatusCollector collector = new BSHostStatusCollector(tmpFolder,

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/AbstractCheckDescriptorTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/AbstractCheckDescriptorTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/AbstractCheckDescriptorTest.java
index e65b3e4..a96ca6c 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/AbstractCheckDescriptorTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/AbstractCheckDescriptorTest.java
@@ -128,7 +128,7 @@ public class AbstractCheckDescriptorTest {
 
     Assert.assertEquals("", check.formatEntityList(null));
 
-    final LinkedHashSet<String> failedOn = new LinkedHashSet<String>();
+    final LinkedHashSet<String> failedOn = new LinkedHashSet<>();
     Assert.assertEquals("", check.formatEntityList(failedOn));
 
     failedOn.add("host1");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/ClientRetryPropertyCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ClientRetryPropertyCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ClientRetryPropertyCheckTest.java
index c535978..05a3c11 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ClientRetryPropertyCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ClientRetryPropertyCheckTest.java
@@ -69,7 +69,7 @@ public class ClientRetryPropertyCheckTest {
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(m_clusters.getCluster("cluster")).thenReturn(cluster);
 
-    Map<String, Service> services = new HashMap<String, Service>();
+    Map<String, Service> services = new HashMap<>();
     Mockito.when(cluster.getServices()).thenReturn(services);
 
     PrereqCheckRequest request = new PrereqCheckRequest("cluster");
@@ -94,12 +94,12 @@ public class ClientRetryPropertyCheckTest {
 
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(m_clusters.getCluster("cluster")).thenReturn(cluster);
-    Map<String, Service> services = new HashMap<String, Service>();
+    Map<String, Service> services = new HashMap<>();
     Mockito.when(cluster.getServices()).thenReturn(services);
 
     final DesiredConfig desiredConfig = Mockito.mock(DesiredConfig.class);
     Mockito.when(desiredConfig.getTag()).thenReturn("tag");
-    Map<String, DesiredConfig> configMap = new HashMap<String, 
DesiredConfig>();
+    Map<String, DesiredConfig> configMap = new HashMap<>();
     configMap.put("hdfs-site", desiredConfig);
     configMap.put("hive-site", desiredConfig);
     configMap.put("oozie-env", desiredConfig);
@@ -107,7 +107,7 @@ public class ClientRetryPropertyCheckTest {
     Mockito.when(cluster.getDesiredConfigs()).thenReturn(configMap);
     final Config config = Mockito.mock(Config.class);
     Mockito.when(cluster.getConfig(Mockito.anyString(), 
Mockito.anyString())).thenReturn(config);
-    final Map<String, String> properties = new HashMap<String, String>();
+    final Map<String, String> properties = new HashMap<>();
     Mockito.when(config.getProperties()).thenReturn(properties);
 
     // Add HDFS

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/ComponentsInstallationCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ComponentsInstallationCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ComponentsInstallationCheckTest.java
index 450d74e..7cdd121 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ComponentsInstallationCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ComponentsInstallationCheckTest.java
@@ -106,7 +106,7 @@ public class ComponentsInstallationCheckTest {
     
Mockito.when(tezService.getMaintenanceState()).thenReturn(MaintenanceState.OFF);
     
Mockito.when(amsService.getMaintenanceState()).thenReturn(MaintenanceState.OFF);
 
-    HashMap<String, Service> clusterServices = new HashMap<String, Service>();
+    HashMap<String, Service> clusterServices = new HashMap<>();
     clusterServices.put("HDFS", hdfsService);
     clusterServices.put("TEZ", tezService);
     clusterServices.put("AMBARI_METRICS", amsService);
@@ -138,7 +138,7 @@ public class ComponentsInstallationCheckTest {
 
     // Put Components inside Services
     // HDFS
-    Map<String, ServiceComponent> hdfsComponents = new HashMap<String, 
ServiceComponent>();
+    Map<String, ServiceComponent> hdfsComponents = new HashMap<>();
 
     ServiceComponent nameNode = Mockito.mock(ServiceComponent.class);
     Mockito.when(nameNode.getName()).thenReturn("NAMENODE");
@@ -165,7 +165,7 @@ public class ComponentsInstallationCheckTest {
     
Mockito.when(hdfsService.getServiceComponents()).thenReturn(hdfsComponents);
 
     // TEZ
-    Map<String, ServiceComponent> tezComponents = new HashMap<String, 
ServiceComponent>();
+    Map<String, ServiceComponent> tezComponents = new HashMap<>();
 
     ServiceComponent tezClient = Mockito.mock(ServiceComponent.class);
     Mockito.when(tezClient.getName()).thenReturn("TEZ_CLIENT");
@@ -177,7 +177,7 @@ public class ComponentsInstallationCheckTest {
     Mockito.when(tezService.getServiceComponents()).thenReturn(tezComponents);
 
     // AMS
-    Map<String, ServiceComponent> amsComponents = new HashMap<String, 
ServiceComponent>();
+    Map<String, ServiceComponent> amsComponents = new HashMap<>();
 
     ServiceComponent metricsCollector = Mockito.mock(ServiceComponent.class);
     Mockito.when(metricsCollector.getName()).thenReturn("METRICS_COLLECTOR");
@@ -203,7 +203,7 @@ public class ComponentsInstallationCheckTest {
     final HostComponentSummary hcsMetricsCollector = 
Mockito.mock(HostComponentSummary.class);
     final HostComponentSummary hcsMetricsMonitor = 
Mockito.mock(HostComponentSummary.class);
 
-    List<HostComponentSummary> allHostComponentSummaries = new 
ArrayList<HostComponentSummary>();
+    List<HostComponentSummary> allHostComponentSummaries = new ArrayList<>();
     allHostComponentSummaries.add(hcsNameNode);
     allHostComponentSummaries.add(hcsDataNode1);
     allHostComponentSummaries.add(hcsDataNode2);
@@ -213,7 +213,7 @@ public class ComponentsInstallationCheckTest {
     allHostComponentSummaries.add(hcsMetricsCollector);
     allHostComponentSummaries.add(hcsMetricsMonitor);
 
-    final Map<String, Host> hosts = new HashMap<String, Host>();
+    final Map<String, Host> hosts = new HashMap<>();
     final Host host1 = Mockito.mock(Host.class);
     final Host host2 = Mockito.mock(Host.class);
     final Host host3 = Mockito.mock(Host.class);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/ConfigurationMergeCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ConfigurationMergeCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ConfigurationMergeCheckTest.java
index 68a0522..1e0405b 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ConfigurationMergeCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ConfigurationMergeCheckTest.java
@@ -57,7 +57,7 @@ public class ConfigurationMergeCheckTest {
   private static final String CONFIG_PROPERTY = "hdfs.property";
 
   private Clusters clusters = EasyMock.createMock(Clusters.class);
-  private Map<String, String> m_configMap = new HashMap<String, String>();
+  private Map<String, String> m_configMap = new HashMap<>();
 
   private static final StackId stackId_1_0 = new StackId("HDP-1.0");
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheckTest.java
index cdf13eb..15e3c6d 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/HiveDynamicServiceDiscoveryCheckTest.java
@@ -69,16 +69,16 @@ public class HiveDynamicServiceDiscoveryCheckTest {
 
     final DesiredConfig desiredConfig = Mockito.mock(DesiredConfig.class);
     Mockito.when(desiredConfig.getTag()).thenReturn("tag");
-    Map<String, DesiredConfig> configMap = new HashMap<String, 
DesiredConfig>();
+    Map<String, DesiredConfig> configMap = new HashMap<>();
     configMap.put("hive-site", desiredConfig);
 
     Mockito.when(cluster.getDesiredConfigs()).thenReturn(configMap);
     final Config config = Mockito.mock(Config.class);
     Mockito.when(cluster.getConfig(Mockito.anyString(), 
Mockito.anyString())).thenReturn(config);
-    final Map<String, String> properties = new HashMap<String, String>();
+    final Map<String, String> properties = new HashMap<>();
     Mockito.when(config.getProperties()).thenReturn(properties);
 
-    Map<String, String> checkProperties = new HashMap<String, String>();
+    Map<String, String> checkProperties = new HashMap<>();
     checkProperties.put("min-failure-stack-version","HDP-2.3.0.0");
     PrerequisiteCheckConfig prerequisiteCheckConfig = 
Mockito.mock(PrerequisiteCheckConfig.class);
     Mockito.when(prerequisiteCheckConfig.getCheckProperties(

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/HiveMultipleMetastoreCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/HiveMultipleMetastoreCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/HiveMultipleMetastoreCheckTest.java
index 16f383a..9645389 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/HiveMultipleMetastoreCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/HiveMultipleMetastoreCheckTest.java
@@ -71,7 +71,7 @@ public class HiveMultipleMetastoreCheckTest {
 
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(m_clusters.getCluster("cluster")).thenReturn(cluster);
-    Map<String, Service> services = new HashMap<String, Service>();
+    Map<String, Service> services = new HashMap<>();
     Mockito.when(cluster.getServices()).thenReturn(services);
 
     services.put("HDFS", Mockito.mock(Service.class));
@@ -107,7 +107,7 @@ public class HiveMultipleMetastoreCheckTest {
 
     
Mockito.when(hive.getServiceComponent("HIVE_METASTORE")).thenReturn(metastore);
 
-    Map<String, ServiceComponentHost> metastores = new HashMap<String, 
ServiceComponentHost>();
+    Map<String, ServiceComponentHost> metastores = new HashMap<>();
     Mockito.when(metastore.getServiceComponentHosts()).thenReturn(metastores);
 
     PrerequisiteCheck check = new PrerequisiteCheck(null, null);
@@ -129,10 +129,10 @@ public class HiveMultipleMetastoreCheckTest {
   @Test
   public void testPerformFail() throws Exception{
     final Cluster cluster = Mockito.mock(Cluster.class);
-    final LinkedHashSet<String> failedOnExpected = new LinkedHashSet<String>();
+    final LinkedHashSet<String> failedOnExpected = new LinkedHashSet<>();
     Service hive = Mockito.mock(Service.class);
     ServiceComponent metastore = Mockito.mock(ServiceComponent.class);
-    Map<String, ServiceComponentHost> metastores = new HashMap<String, 
ServiceComponentHost>();
+    Map<String, ServiceComponentHost> metastores = new HashMap<>();
 
     failedOnExpected.add("HIVE");
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheckTest.java
index 9fcb319..7b7d817 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsMasterMaintenanceCheckTest.java
@@ -116,7 +116,7 @@ public class HostsMasterMaintenanceCheckTest {
     hostsMasterMaintenanceCheck.perform(check, new 
PrereqCheckRequest("cluster"));
     Assert.assertEquals(PrereqCheckStatus.FAIL, check.getStatus());
 
-    final Map<String, UpgradePack> upgradePacks = new HashMap<String, 
UpgradePack>();
+    final Map<String, UpgradePack> upgradePacks = new HashMap<>();
     final UpgradePack upgradePack = Mockito.mock(UpgradePack.class);
     Mockito.when(upgradePack.getName()).thenReturn(upgradePackName);
     upgradePacks.put(upgradePack.getName(), upgradePack);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheckTest.java
index 433eee1..4446cc4 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/HostsRepositoryVersionCheckTest.java
@@ -97,7 +97,7 @@ public class HostsRepositoryVersionCheckTest {
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(cluster.getDesiredStackVersion()).thenReturn(new StackId());
     Mockito.when(clusters.getCluster("cluster")).thenReturn(cluster);
-    final Map<String, Host> hosts = new HashMap<String, Host>();
+    final Map<String, Host> hosts = new HashMap<>();
     final Host host1 = Mockito.mock(Host.class);
     final Host host2 = Mockito.mock(Host.class);
     final Host host3 = Mockito.mock(Host.class);
@@ -177,7 +177,7 @@ public class HostsRepositoryVersionCheckTest {
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(cluster.getDesiredStackVersion()).thenReturn(new StackId());
     Mockito.when(clusters.getCluster("cluster")).thenReturn(cluster);
-    final Map<String, Host> hosts = new HashMap<String, Host>();
+    final Map<String, Host> hosts = new HashMap<>();
     final Host host1 = Mockito.mock(Host.class);
     final Host host2 = Mockito.mock(Host.class);
     final Host host3 = Mockito.mock(Host.class);
@@ -234,7 +234,7 @@ public class HostsRepositoryVersionCheckTest {
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(cluster.getDesiredStackVersion()).thenReturn(new StackId());
     Mockito.when(clusters.getCluster("cluster")).thenReturn(cluster);
-    final Map<String, Host> hosts = new HashMap<String, Host>();
+    final Map<String, Host> hosts = new HashMap<>();
     final Host host1 = Mockito.mock(Host.class);
     final Host host2 = Mockito.mock(Host.class);
     final Host host3 = Mockito.mock(Host.class);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/InstallPackagesCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/InstallPackagesCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/InstallPackagesCheckTest.java
index c45c59d..86a682c 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/InstallPackagesCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/InstallPackagesCheckTest.java
@@ -136,13 +136,13 @@ public class InstallPackagesCheckTest {
     
Mockito.when(clusterVersionEntity.getState()).thenReturn(RepositoryVersionState.INSTALLED);
     Mockito.when(clusterVersionDAO.findByClusterAndStackAndVersion(
         clusterName, targetStackId, 
repositoryVersion)).thenReturn(clusterVersionEntity);
-    final List<String> hostNames = new ArrayList<String>();
+    final List<String> hostNames = new ArrayList<>();
     hostNames.add("host1");
     hostNames.add("host2");
     hostNames.add("host3");
 
-    final List<Host> hosts = new ArrayList<Host>();
-    final List<HostVersionEntity> hostVersionEntities = new 
ArrayList<HostVersionEntity>();
+    final List<Host> hosts = new ArrayList<>();
+    final List<HostVersionEntity> hostVersionEntities = new ArrayList<>();
     for(String hostName : hostNames) {
       Host host =  Mockito.mock(Host.class);
       Mockito.when(host.getHostName()).thenReturn(hostName);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheckTest.java
index a48663a..61953a7 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/MapReduce2JobHistoryStatePreservingCheckTest.java
@@ -73,7 +73,7 @@ public class MapReduce2JobHistoryStatePreservingCheckTest {
     Mockito.when(m_clusters.getCluster("cluster")).thenReturn(cluster);
     Mockito.when(cluster.getCurrentStackVersion()).thenReturn(new 
StackId("HDP-2.3"));
 
-    Map<String, Service> services = new HashMap<String, Service>();
+    Map<String, Service> services = new HashMap<>();
     Mockito.when(cluster.getServices()).thenReturn(services);
 
     ClusterVersionEntity clusterVersionEntity = 
Mockito.mock(ClusterVersionEntity.class);
@@ -99,14 +99,14 @@ public class MapReduce2JobHistoryStatePreservingCheckTest {
 
     final DesiredConfig desiredConfig = Mockito.mock(DesiredConfig.class);
     Mockito.when(desiredConfig.getTag()).thenReturn("tag");
-    Map<String, DesiredConfig> configMap = new HashMap<String, 
DesiredConfig>();
+    Map<String, DesiredConfig> configMap = new HashMap<>();
     configMap.put("mapred-site", desiredConfig);
     configMap.put("yarn-site", desiredConfig);
 
     Mockito.when(cluster.getDesiredConfigs()).thenReturn(configMap);
     final Config config = Mockito.mock(Config.class);
     Mockito.when(cluster.getConfig(Mockito.anyString(), 
Mockito.anyString())).thenReturn(config);
-    final Map<String, String> properties = new HashMap<String, String>();
+    final Map<String, String> properties = new HashMap<>();
     Mockito.when(config.getProperties()).thenReturn(properties);
 
     PrerequisiteCheck check = new PrerequisiteCheck(null, null);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerAuditDbCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerAuditDbCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerAuditDbCheckTest.java
index 81f243a..e3e14d5 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerAuditDbCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerAuditDbCheckTest.java
@@ -87,13 +87,13 @@ public class RangerAuditDbCheckTest {
 
     final DesiredConfig desiredConfig = Mockito.mock(DesiredConfig.class);
     Mockito.when(desiredConfig.getTag()).thenReturn("tag");
-    Map<String, DesiredConfig> configMap = new HashMap<String, 
DesiredConfig>();
+    Map<String, DesiredConfig> configMap = new HashMap<>();
     configMap.put("ranger-admin-site", desiredConfig);
 
     Mockito.when(cluster.getDesiredConfigs()).thenReturn(configMap);
     final Config config = Mockito.mock(Config.class);
     Mockito.when(cluster.getConfig(Mockito.anyString(), 
Mockito.anyString())).thenReturn(config);
-    final Map<String, String> properties = new HashMap<String, String>();
+    final Map<String, String> properties = new HashMap<>();
     Mockito.when(config.getProperties()).thenReturn(properties);
 
     properties.put("ranger.audit.source.type", "db");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerPasswordCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerPasswordCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerPasswordCheckTest.java
index e5b231f..91b3296 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerPasswordCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerPasswordCheckTest.java
@@ -82,7 +82,7 @@ public class RangerPasswordCheckTest {
       "]}";
 
   private Clusters m_clusters = EasyMock.createMock(Clusters.class);
-  private Map<String, String> m_configMap = new HashMap<String, String>();
+  private Map<String, String> m_configMap = new HashMap<>();
   private RangerPasswordCheck m_rpc = null;
   private URLStreamProvider m_streamProvider = 
EasyMock.createMock(URLStreamProvider.class);
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerSSLConfigCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerSSLConfigCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerSSLConfigCheckTest.java
index 2af5502..327faf9 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerSSLConfigCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/RangerSSLConfigCheckTest.java
@@ -88,13 +88,13 @@ public class RangerSSLConfigCheckTest {
 
     final DesiredConfig desiredConfig = Mockito.mock(DesiredConfig.class);
     Mockito.when(desiredConfig.getTag()).thenReturn("tag");
-    Map<String, DesiredConfig> configMap = new HashMap<String, 
DesiredConfig>();
+    Map<String, DesiredConfig> configMap = new HashMap<>();
     configMap.put("ranger-admin-site", desiredConfig);
 
     Mockito.when(cluster.getDesiredConfigs()).thenReturn(configMap);
     final Config config = Mockito.mock(Config.class);
     Mockito.when(cluster.getConfig(Mockito.anyString(), 
Mockito.anyString())).thenReturn(config);
-    final Map<String, String> properties = new HashMap<String, String>();
+    final Map<String, String> properties = new HashMap<>();
     Mockito.when(config.getProperties()).thenReturn(properties);
 
     properties.put("ranger.service.http.enabled","true");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicePresenceCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicePresenceCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicePresenceCheckTest.java
index 03b0e81..d89f0e5 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicePresenceCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicePresenceCheckTest.java
@@ -62,7 +62,7 @@ public class ServicePresenceCheckTest {
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(m_clusters.getCluster("cluster")).thenReturn(cluster);
 
-    Map<String, String> checkProperties = new HashMap<String, String>();
+    Map<String, String> checkProperties = new HashMap<>();
     
checkProperties.put(ServicePresenceCheck.NO_UPGRADE_SUPPORT_SERVICES_PROPERTY_NAME,"MyServiceOne,
 MyServiceTwo");
     
checkProperties.put(ServicePresenceCheck.REMOVED_SERVICES_PROPERTY_NAME,"OldServiceOne,
 OldServiceTwo");
     
checkProperties.put(ServicePresenceCheck.NEW_SERVICES_PROPERTY_NAME,"NewServiceOne,
 NewServiceTwo");
@@ -86,11 +86,11 @@ public class ServicePresenceCheckTest {
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(m_clusters.getCluster("cluster")).thenReturn(cluster);
 
-    Map<String, Service> services = new HashMap<String, Service>();
+    Map<String, Service> services = new HashMap<>();
     services.put("ATLAS", Mockito.mock(Service.class));
     Mockito.when(cluster.getServices()).thenReturn(services);
 
-    Map<String, String> checkProperties = new HashMap<String, String>();
+    Map<String, String> checkProperties = new HashMap<>();
     
checkProperties.put(ServicePresenceCheck.NO_UPGRADE_SUPPORT_SERVICES_PROPERTY_NAME,"Atlas,
 MyService");
     PrerequisiteCheckConfig prerequisiteCheckConfig = 
Mockito.mock(PrerequisiteCheckConfig.class);
     Mockito.when(prerequisiteCheckConfig.getCheckProperties(
@@ -110,12 +110,12 @@ public class ServicePresenceCheckTest {
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(m_clusters.getCluster("cluster")).thenReturn(cluster);
 
-    Map<String, Service> services = new HashMap<String, Service>();
+    Map<String, Service> services = new HashMap<>();
     services.put("ATLAS", Mockito.mock(Service.class));
     services.put("OLDSERVICE", Mockito.mock(Service.class));
     Mockito.when(cluster.getServices()).thenReturn(services);
 
-    Map<String, String> checkProperties = new HashMap<String, String>();
+    Map<String, String> checkProperties = new HashMap<>();
     
checkProperties.put(ServicePresenceCheck.REMOVED_SERVICES_PROPERTY_NAME,"Atlas, 
OldService");
     
checkProperties.put(ServicePresenceCheck.NEW_SERVICES_PROPERTY_NAME,"Atlas2, 
NewService");
 
@@ -137,11 +137,11 @@ public class ServicePresenceCheckTest {
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(m_clusters.getCluster("cluster")).thenReturn(cluster);
 
-    Map<String, Service> services = new HashMap<String, Service>();
+    Map<String, Service> services = new HashMap<>();
     services.put("ATLAS", Mockito.mock(Service.class));
     Mockito.when(cluster.getServices()).thenReturn(services);
 
-    Map<String, String> checkProperties = new HashMap<String, String>();
+    Map<String, String> checkProperties = new HashMap<>();
     
checkProperties.put(ServicePresenceCheck.NO_UPGRADE_SUPPORT_SERVICES_PROPERTY_NAME,"MyServiceOne,
 MyServiceTwo");
     
checkProperties.put(ServicePresenceCheck.REMOVED_SERVICES_PROPERTY_NAME,"Atlas, 
OldService");
     
checkProperties.put(ServicePresenceCheck.NEW_SERVICES_PROPERTY_NAME,"Atlas2, 
NewService");
@@ -164,11 +164,11 @@ public class ServicePresenceCheckTest {
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(m_clusters.getCluster("cluster")).thenReturn(cluster);
 
-    Map<String, Service> services = new HashMap<String, Service>();
+    Map<String, Service> services = new HashMap<>();
     services.put("OLDSERVICE", Mockito.mock(Service.class));
     Mockito.when(cluster.getServices()).thenReturn(services);
 
-    Map<String, String> checkProperties = new HashMap<String, String>();
+    Map<String, String> checkProperties = new HashMap<>();
     
checkProperties.put(ServicePresenceCheck.NO_UPGRADE_SUPPORT_SERVICES_PROPERTY_NAME,"Atlas,
 MyService");
     
checkProperties.put(ServicePresenceCheck.REMOVED_SERVICES_PROPERTY_NAME,"OldService");
     
checkProperties.put(ServicePresenceCheck.NEW_SERVICES_PROPERTY_NAME,"NewService");
@@ -191,14 +191,14 @@ public class ServicePresenceCheckTest {
     Mockito.when(cluster.getClusterId()).thenReturn(1L);
     Mockito.when(m_clusters.getCluster("cluster")).thenReturn(cluster);
 
-    Map<String, Service> services = new HashMap<String, Service>();
+    Map<String, Service> services = new HashMap<>();
     services.put("ATLAS", Mockito.mock(Service.class));
     services.put("HDFS", Mockito.mock(Service.class));
     services.put("STORM", Mockito.mock(Service.class));
     services.put("RANGER", Mockito.mock(Service.class));
     Mockito.when(cluster.getServices()).thenReturn(services);
 
-    Map<String, String> checkProperties = new HashMap<String, String>();
+    Map<String, String> checkProperties = new HashMap<>();
     
checkProperties.put(ServicePresenceCheck.NO_UPGRADE_SUPPORT_SERVICES_PROPERTY_NAME,"Atlas,
 HDFS");
     
checkProperties.put(ServicePresenceCheck.REMOVED_SERVICES_PROPERTY_NAME,"Storm, 
Ranger");
     
checkProperties.put(ServicePresenceCheck.NEW_SERVICES_PROPERTY_NAME,"Storm2, 
Ranger2");

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheckTest.java
index 22f2b1b..f6ad846 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesMapReduceDistributedCacheCheckTest.java
@@ -93,13 +93,13 @@ public class ServicesMapReduceDistributedCacheCheckTest {
 
     final DesiredConfig desiredConfig = Mockito.mock(DesiredConfig.class);
     Mockito.when(desiredConfig.getTag()).thenReturn("tag");
-    Map<String, DesiredConfig> configMap = new HashMap<String, 
DesiredConfig>();
+    Map<String, DesiredConfig> configMap = new HashMap<>();
     configMap.put("mapred-site", desiredConfig);
     configMap.put("core-site", desiredConfig);
     Mockito.when(cluster.getDesiredConfigs()).thenReturn(configMap);
     final Config config = Mockito.mock(Config.class);
     Mockito.when(cluster.getConfig(Mockito.anyString(), 
Mockito.anyString())).thenReturn(config);
-    final Map<String, String> properties = new HashMap<String, String>();
+    final Map<String, String> properties = new HashMap<>();
     Mockito.when(config.getProperties()).thenReturn(properties);
 
     PrerequisiteCheck check = new PrerequisiteCheck(null, null);
@@ -151,16 +151,16 @@ public class ServicesMapReduceDistributedCacheCheckTest {
 
     final DesiredConfig desiredConfig = Mockito.mock(DesiredConfig.class);
     Mockito.when(desiredConfig.getTag()).thenReturn("tag");
-    Map<String, DesiredConfig> configMap = new HashMap<String, 
DesiredConfig>();
+    Map<String, DesiredConfig> configMap = new HashMap<>();
     configMap.put("mapred-site", desiredConfig);
     configMap.put("core-site", desiredConfig);
     Mockito.when(cluster.getDesiredConfigs()).thenReturn(configMap);
     final Config config = Mockito.mock(Config.class);
     Mockito.when(cluster.getConfig(Mockito.anyString(), 
Mockito.anyString())).thenReturn(config);
-    final Map<String, String> properties = new HashMap<String, String>();
+    final Map<String, String> properties = new HashMap<>();
     Mockito.when(config.getProperties()).thenReturn(properties);
 
-    Map<String, String> checkProperties = new HashMap<String, String>();
+    Map<String, String> checkProperties = new HashMap<>();
     checkProperties.put("dfs-protocols-regex","^([^:]*dfs|wasb|ecs):.*");
     PrerequisiteCheckConfig prerequisiteCheckConfig = 
Mockito.mock(PrerequisiteCheckConfig.class);
     Mockito.when(prerequisiteCheckConfig.getCheckProperties(

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheckTest.java
index 282ccb9..a2a74bd 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeHighAvailabilityCheckTest.java
@@ -88,7 +88,7 @@ public class ServicesNamenodeHighAvailabilityCheckTest {
     
Mockito.when(cluster.getDesiredConfigs()).thenReturn(Collections.singletonMap("hdfs-site",
 desiredConfig));
     final Config config = Mockito.mock(Config.class);
     Mockito.when(cluster.getConfig(Mockito.anyString(), 
Mockito.anyString())).thenReturn(config);
-    final Map<String, String> properties = new HashMap<String, String>();
+    final Map<String, String> properties = new HashMap<>();
     Mockito.when(config.getProperties()).thenReturn(properties);
 
     PrerequisiteCheck check = new PrerequisiteCheck(null, null);

http://git-wip-us.apache.org/repos/asf/ambari/blob/edbb5492/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheckTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheckTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheckTest.java
index f43907d..7d1f907 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheckTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/checks/ServicesNamenodeTruncateCheckTest.java
@@ -50,7 +50,7 @@ public class ServicesNamenodeTruncateCheckTest {
 
   private Clusters m_clusters = EasyMock.createMock(Clusters.class);
   private ServicesNamenodeTruncateCheck m_check = new 
ServicesNamenodeTruncateCheck();
-  private final Map<String, String> m_configMap = new HashMap<String, 
String>();
+  private final Map<String, String> m_configMap = new HashMap<>();
 
   @Before
   public void setup() throws Exception {

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