HDFS-4518. Add missing CHANGES.txt description
HDFS-4518. Add missing CHANGES.txt description

git-svn-id: 68840cca9c4532603a19859f2a2ff9d7d8a9b06d@1453052 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