HDFS-12629. NameNode UI should report total blocks count by type - replicated and erasure coded.

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

@@ -147,7 +147,7 @@
 
 <p>
   {#fs}
-  {FilesTotal|fmt_number} files and directories, {BlocksTotal|fmt_number} blocks = {ObjectsTotal|fmt_number} total filesystem object(s).
+  {FilesTotal|fmt_number} files and directories, {BlocksTotal|fmt_number} blocks ({#replicastat}{TotalReplicatedBlocks|fmt_number}{/replicastat} replicated blocks, {#ecstat}{TotalECBlockGroups|fmt_number}{/ecstat} erasure coded block groups) = {ObjectsTotal|fmt_number} total filesystem object(s).
   {#helper_fs_max_objects/}
   {/fs}
 </p>

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

@@ -37,6 +37,8 @@
       {"name": "nnstat",  "url": "/jmx?qry=Hadoop:service=NameNode,name=NameNodeStatus"},
       {"name": "fs",      "url": "/jmx?qry=Hadoop:service=NameNode,name=FSNamesystemState"},
       {"name": "fsn",     "url": "/jmx?qry=Hadoop:service=NameNode,name=FSNamesystem"},
+      {"name": "replicastat",      "url": "/jmx?qry=Hadoop:service=NameNode,name=ReplicatedBlocksState"},
+      {"name": "ecstat",      "url": "/jmx?qry=Hadoop:service=NameNode,name=ECBlockGroupsState"},
       {"name": "blockstats",      "url": "/jmx?qry=Hadoop:service=NameNode,name=BlockStats"},
       {"name": "mem",     "url": "/jmx?qry=java.lang:type=Memory"}
     ];