HDFS-13244. Add stack, conf, metrics links to utilities dropdown in NN webUI. Contributed by Bharat Viswanadham.

(cherry picked from commit 4eeff62f6925991bca725b1ede5308055817de80)

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/dfshealth.html

@@ -43,6 +43,9 @@
       <ul class="dropdown-menu">
         <li><a href="explorer.html">Browse the file system</a></li>
         <li><a href="logs">Logs</a></li>
+        <li><a href="jmx">Metrics</a></li>
+        <li><a href="conf">Configuration</a></li>
+        <li><a href="stacks">Process Thread Dump</a></li>
       </ul>
     </li>
   </ul>

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/explorer.html

@@ -44,6 +44,9 @@
           <ul class="dropdown-menu">
             <li><a href="#">Browse the file system</a></li>
             <li><a href="logs">Logs</a></li>
+            <li><a href="jmx">Metrics</a></li>
+            <li><a href="conf">Configuration</a></li>
+            <li><a href="stacks">Process Thread Dump</a></li>
           </ul>
         </li>
       </ul>