YARN-1254. Fixed NodeManager to not pollute container's credentials. Contributed by Omkar Vinit Joshi.
svn merge --ignore-ancestry -c 1529382 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1529383 13f79535-47bb-0310-9956-ffa450edef68
YARN-1271. Addendum patch to remove unused method in ContainerExecutor. Contributed by Sandy Ryza.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1529386 13f79535-47bb-0310-9956-ffa450edef68
YARN-1273. Fixed Distributed-shell to account for containers that failed to start. Contributed by Hitesh Shah.
svn merge --ignore-ancestry -c 1529389 ../../trunk


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1529390 13f79535-47bb-0310-9956-ffa450edef68