HDFS-10217. show 'blockScheduled' tooltip in datanodes table.

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

@@ -320,7 +320,7 @@
         </div>
       </div>
     </td>
-    <td>{numBlocks}</td>
+    <td title="Blocks Scheduled : {blockScheduled}">{numBlocks}</td>
     <td ng-value="{blockPoolUsedPercent}">{blockPoolUsed|fmt_bytes} ({blockPoolUsedPercent|fmt_percentage})</td>
     <td>{version}</td>
   </tr>