YARN-11579. Fix CheckStyle.

Author: slfan1989

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/TestRMWebServices.java

@@ -481,7 +481,7 @@ public void verifyClusterMetricsJSON(JSONObject json) throws JSONException,
       Exception {
     assertEquals("incorrect number of elements", 1, json.length());
     JSONObject clusterinfo = json.getJSONObject("clusterMetrics");
-    assertEquals("incorrect number of elements", 35, clusterinfo.length());
+    assertEquals("incorrect number of elements", 37, clusterinfo.length());
     verifyClusterMetrics(
         clusterinfo.getInt("appsSubmitted"), clusterinfo.getInt("appsCompleted"),
         clusterinfo.getInt("reservedMB"), clusterinfo.getInt("availableMB"),