HDFS-14046. In-Maintenance ICON is missing in datanode info page. Contributed by Ranith Sardar.

(cherry picked from commit 686fcd4db34dfe8642ff4b25fffbc73e42217f30)

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

@@ -300,6 +300,7 @@
     <li class="dfshealth-node-icon dfshealth-node-down">Down</li>
     <li class="dfshealth-node-icon dfshealth-node-decommissioned">Decommissioned</li>
     <li class="dfshealth-node-icon dfshealth-node-down-decommissioned">Decommissioned &amp; dead</li>
+    <li class="dfshealth-node-icon dfshealth-node-in-maintenance">In Maintenance</li>
     <li class="dfshealth-node-icon dfshealth-node-down-maintenance">In Maintenance &amp; dead</li>
   </ul>
 </div>

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/static/hadoop.css

@@ -240,6 +240,16 @@ header.bs-docs-nav, header.bs-docs-nav .navbar-brand {
     content: "\e090";
 }
 
+.dfshealth-node-in-maintenance:before {
+    color: #eea236;
+    content: "\e136";
+}
+
+.dfshealth-node-entering-maintenance:before {
+    color: #eea236;
+    content: "\e136";
+}
+
 .dfshealth-node-down:before {
     color: #c7254e;
     content: "\e101";
@@ -251,7 +261,7 @@ header.bs-docs-nav, header.bs-docs-nav .navbar-brand {
 }
 
 .dfshealth-node-down-maintenance:before {
-    color: #eea236;
+    color: #c7254e;
     content: "\e136";
 }