YARN-11263. Fix Junit Test & CheckStyle.

Author: slfan1989

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/TestContainerManager.java

@@ -1200,12 +1200,12 @@ protected void testContainerLaunchAndExit(int exitCode) throws IOException,
   @Test
   public void testContainerLaunchAndExitSuccess() throws IOException,
       InterruptedException, YarnException {
-	containerManager.start();
+    containerManager.start();
     int exitCode = 0;
 
-	// launch context for a command that will return exit code 0
-	// and verify exit code returned
-	testContainerLaunchAndExit(exitCode);
+    // launch context for a command that will return exit code 0
+    // and verify exit code returned
+    testContainerLaunchAndExit(exitCode);
   }
 
   @Test

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/gpu/TestGpuResourceAllocator.java

@@ -365,7 +365,7 @@ public void testThreeContainersJustTwoOfThemSatisfied()
           assertEquals(1, testSubject.getAvailableGpus());
 
           testSubject.assignGpus(container3);
-      });
+        });
 
     assertThat(exception.getMessage()).contains("Failed to find enough GPUs");
   }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/resourceplugin/com/nec/TestVEDeviceDiscoverer.java

@@ -241,10 +241,10 @@ public void testNonVESlotFilesAreSkipped() throws IOException {
   public void testNonBlockOrCharFilesAreRejected() throws IOException {
     IllegalArgumentException exception =
           assertThrows(IllegalArgumentException.class, () -> {
-          createVeSlotFile(0);
-          when(mockCommandExecutor.getOutput()).thenReturn("0:0:regular file");
-          discoverer.getDevicesFromPath(testFolder);
-        });
+            createVeSlotFile(0);
+            when(mockCommandExecutor.getOutput()).thenReturn("0:0:regular file");
+            discoverer.getDevicesFromPath(testFolder);
+          });
     assertThat(exception.getMessage()).contains("File is neither a char nor block device");
   }