Updated CHANGES.txt for Merge r:1349466 HDFS-3389. Document the BKJM usage in Namenode HA. Contributed by Uma Maheswara Rao G and Ivan Kelly.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1349470 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -202,6 +202,8 @@ Release 2.0.1-alpha - UNRELEASED
 
     HDFS-3408. BKJM : Namenode format fails, if there is no BK root. (Rakesh R via umamahesh)
 
+    HDFS-3389. Document the BKJM usage in Namenode HA. (umamahesh and Ivan Kelly via umamahesh)
+
   BREAKDOWN OF HDFS-3042 SUBTASKS
 
     HDFS-2185. HDFS portion of ZK-based FailoverController (todd)