Updated contributors name in CHANGES.txt for HDFS-6783

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1617880 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -506,7 +506,7 @@ Release 2.6.0 - UNRELEASED
     HDFS-6247. Avoid timeouts for replaceBlock() call by sending intermediate
     responses to Balancer (vinayakumarb)
 
-    HDFS-6783. Fix HDFS CacheReplicationMonitor rescan logic. (Yi Liu via umamahesh)
+    HDFS-6783. Fix HDFS CacheReplicationMonitor rescan logic. (Yi Liu and Colin Patrick McCabe via umamahesh)
 
 Release 2.5.0 - UNRELEASED