YARN-11445. 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/webapp/dao/ClusterInfo.java

@@ -44,7 +44,7 @@ public class ClusterInfo {
   protected String hadoopVersionBuiltOn;
   protected String haZooKeeperConnectionState;
 
-  protected String subClusterId;
+  private String subClusterId;
 
   public ClusterInfo() {
   } // JAXB needs this

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/ClusterUserInfo.java

@@ -64,11 +64,11 @@ public String getRequestedUser() {
         return requestedUser;
     }
 
-    public String getSubClusterId() {
-        return subClusterId;
-    }
+  public String getSubClusterId() {
+    return subClusterId;
+  }
 
-    public void setSubClusterId(String subClusterId) {
-        this.subClusterId = subClusterId;
-    }
+  public void setSubClusterId(String subClusterId) {
+    this.subClusterId = subClusterId;
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/webapp/dao/FederationClusterUserInfo.java

@@ -17,7 +17,6 @@
  */
 package org.apache.hadoop.yarn.server.router.webapp.dao;
 
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.ClusterInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.ClusterUserInfo;
 
 import javax.xml.bind.annotation.XmlAccessType;