YARN-11332. Fix CheckStyle.

Author: slfan1989

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/yarn-default.xml

@@ -5074,8 +5074,8 @@
       This configurable is used to set the keepAliveTime of the thread pool of the interceptor.
       Default is 0s.
     </description>
-  </property>   
- 
+  </property>
+
   <property>
     <name>yarn.router.submit.interval.time</name>
     <value>10ms</value>

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/clientrm/FederationClientInterceptor.java

@@ -1993,7 +1993,7 @@ protected int getNumMaxThreads(Configuration conf) {
         YarnConfiguration.DEFAULT_ROUTER_USER_CLIENT_THREAD_POOL_MAXIMUM_POOL_SIZE);
     return numMaxThreads;
   }
-  
+
   @VisibleForTesting
   public void setNumSubmitRetries(int numSubmitRetries) {
     this.numSubmitRetries = numSubmitRetries;