Fix hadoop-yarn-project/CHANGES.txt for YARN-759

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1493842 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4875. Add a test for testing snapshot file length. Contributed by Arpit Agarwal.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1493850 13f79535-47bb-0310-9956-ffa450edef68
YARN-822. Renamed ApplicationToken to be AMRMToken, and similarly the corresponding TokenSelector and SecretManager. Contributed by Omkar Vinit Joshi.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1493889 13f79535-47bb-0310-9956-ffa450edef68