YARN-1167. Fixed Distributed Shell to not incorrectly show empty hostname on RM UI. Contributed by Xuan Gong.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1529376 13f79535-47bb-0310-9956-ffa450edef68
YARN-1254. Fixed NodeManager to not pollute container's credentials. Contributed by Omkar Vinit Joshi.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1529382 13f79535-47bb-0310-9956-ffa450edef68
YARN-1273. Fixed Distributed-shell to account for containers that failed to start. Contributed by Hitesh Shah.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1529389 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch: upstream/trunk