YARN-11394. Fix CheckStyle.

Author: slfan1989

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/metrics/package-info.java

@@ -20,9 +20,9 @@
  * Package org.apache.hadoop.yarn.server.resourcemanager.metrics contains
  * classes related to publishing app/container events to ATS.
  */
-@InterfaceAudience.Private
-@InterfaceStability.Unstable
+@Private
+@Unstable
 package org.apache.hadoop.yarn.server.resourcemanager.metrics;
 
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+import org.apache.hadoop.classification.InterfaceStability.Unstable;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/preprocessor/package-info.java

@@ -20,9 +20,9 @@
  * This package contains classes to pre process the application submission
  * context with server side configs.
  */
-@InterfaceAudience.Private
-@InterfaceStability.Unstable
+@Private
+@Unstable
 package org.apache.hadoop.yarn.server.resourcemanager.preprocessor;
 
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+import org.apache.hadoop.classification.InterfaceStability.Unstable;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/package-info.java

@@ -16,9 +16,12 @@
  * limitations under the License.
  */
 
-@InterfaceAudience.Private
-@InterfaceStability.Unstable
+/**
+ * This package contains classes to recovery the resourcemanager.
+ */
+@Private
+@Unstable
 package org.apache.hadoop.yarn.server.resourcemanager.recovery;
 
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+import org.apache.hadoop.classification.InterfaceStability.Unstable;