YARN-881. Priority#compareTo method seems to be wrong. (Jian He via bikas)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1516331 13f79535-47bb-0310-9956-ffa450edef68
YARN-1082. Create base directories on HDFS after RM login to ensure RM recovery doesn't fail in secure mode. Contributed by Vinod K V.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1516337 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5045. Add more unit tests for retry cache to cover all AtMostOnce methods. Contributed by Jing Zhao.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1516348 13f79535-47bb-0310-9956-ffa450edef68
YARN-1082. Addendum patch.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1516352 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5468. Fix MR AM recovery for map-only jobs. Contributed by Vinod K. V.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1516358 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5475. Ensure MRClientService verifies ACLs for users. Contributed by Jason Lowe.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1516361 13f79535-47bb-0310-9956-ffa450edef68