MAPREDUCE-5723. MR AM container log can be truncated or empty. (Mohammad Kamrul Islam via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1560593 13f79535-47bb-0310-9956-ffa450edef68
YARN-1573. ZK store should use a private password for root-node-acls. (kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1560595 13f79535-47bb-0310-9956-ffa450edef68