HDFS-14463. Add Log Level link under NameNode and DataNode Web UI Utilities dropdown. Contributed by Siyao Meng.

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>
(cherry picked from commit 7cb46f035a92056783bad23a9abc6a264d71285d)
(cherry picked from commit 0550aa32f1a4b1809c234f8ed785db08b2e33d13)

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

@@ -37,6 +37,7 @@
       <a href="#" class="dropdown-toggle" data-toggle="dropdown">Utilities <b class="caret"></b></a>
       <ul class="dropdown-menu">
         <li><a href="logs/">Logs</a></li>
+        <li><a href="logLevel">Log Level</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>

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

@@ -43,6 +43,7 @@
       <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="logLevel">Log Level</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>

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

@@ -44,6 +44,7 @@
           <ul class="dropdown-menu">
             <li><a href="#">Browse the file system</a></li>
             <li><a href="logs">Logs</a></li>
+            <li><a href="logLevel">Log Level</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>