JDK 9 RFR of JDK-8152936: java/lang/Class/GetPackageTest.java needs update to work with newer testng

[Amy Lu]

To get prepared for the coming testng updating in jtreg [1], 
test/java/lang/Class/GetPackageTest.java needs a minor update as newer 
version of testng requires explicit DataProvider's name (since 6.8.10).

Please review the patch. This works for both current jtreg (testng 
6.8.5), and later testng 6.9.5

bug: https://bugs.openjdk.java.net/browse/JDK-8152936
webrev: http://cr.openjdk.java.net/~amlu/8152936/webrev.00/

Thanks,
Amy

[1]: http://mail.openjdk.java.net/pipermail/jtreg-use/2016-April/000450.html

--- old/test/java/lang/Class/GetPackageTest.java        2016-04-21 
13:30:41.000000000 +0800
+++ new/test/java/lang/Class/GetPackageTest.java        2016-04-21 
13:30:40.000000000 +0800
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -52,7 +52,7 @@
         assertEquals(fooClass.getClassLoader(), loader);
     }
 
-    @DataProvider(name = "testclasses")
+    @DataProvider(name = "testClasses")
     public Object[][] testClasses() {
         return new Object[][] {
                 // primitive type, void, array types