YARN-10824. Title not set for JHS and NM webpages. Contributed by Bilwa S T.

(cherry picked from commit 7c7d02edbd6c17ee8ae2c4bf75e87adace059b76)

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/webapp/HsAboutPage.java

@@ -39,6 +39,7 @@ public class HsAboutPage extends HsView {
     commonPreHead(html);
     //override the nav config from commonPReHead
     set(initID(ACCORDION, "nav"), "{autoHeight:false, active:0}");
+    setTitle("About History Server");
   }
 
   /**

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/webapp/NodePage.java

@@ -41,7 +41,7 @@ public class NodePage extends NMView {
   @Override
   protected void commonPreHead(HTML<__> html) {
     super.commonPreHead(html);
-
+    setTitle("NodeManager information");
     set(initID(ACCORDION, "nav"), "{autoHeight:false, active:1}");
   }