Update CHANGES_HDFS-2832.txt with HDFS-4985, HDFS-5115 and HDFS-5000.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2832@1518426 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES_HDFS-2832.txt

@@ -1,4 +1,14 @@
   BREAKDOWN OF HDFS-2832 ENABLE SUPPORT FOR HETEROGENEOUS STORAGES IN HDFS
 
+IMPROVEMENTS:
+
+    HDFS-4985. Add storage type to the protocol and expose it in block report
+    and block locations. (Arpit Agarwal)
+    
+    HDFS-5115. Make StorageID a UUID. (Arpit Agarwal)
+
+    HDFS-5000. DataNode configuration should allow specifying storage type.
+    (Arpit Agarwal)
+
     HDFS-4987. Namenode changes to track multiple storages per datanode.
     (szetszwo)