Java 1.7 support for org.apache.hadoop.fs.azure testcases

initializationError(org.apache.hadoop.fs.azure.TestNativeAzureFileSystemClientLogging)  Time elapsed: 0.001 sec  <<< ERROR!
java.lang.Exception: Class org.apache.hadoop.fs.azure.AbstractWasbTestBase should be public
	at org.junit.runners.model.FrameworkMethod.validatePublicVoid(FrameworkMethod.java:91)
	at org.junit.runners.model.FrameworkMethod.validatePublicVoidNoArg(FrameworkMethod.java:70)
	at org.junit.runners.ParentRunner.validatePublicVoidNoArgMethods(ParentRunner.java:133)
	at org.junit.runners.BlockJUnit4ClassRunner.validateInstanceMethods(BlockJUnit4ClassRunner.java:165)
	at org.junit.runners.BlockJUnit4ClassRunner.collectInitializationErrors(BlockJUnit4ClassRunner.java:104)
	at org.junit.runners.ParentRunner.validate(ParentRunner.java:355)
	at org.junit.runners.ParentRunner.<init>(ParentRunner.java:76)
	at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:57)
	at org.junit.internal.builders.JUnit4Builder.runnerForClass(JUnit4Builder.java:10)
	at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
	at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
	at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
	at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:26)
	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:262)
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)