HDFS-4651. Adding missed CHANGES.txt in the previous commit.
HDFS-4651. Adding missed CHANGES.txt in the previous commit.

git-svn-id: 1c19491ca72bd5fc58e154fa6c34cbea1ba73e66@1462879 13f79535-47bb-0310-9956-ffa450edef68

awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop,awylie/hadoop