MAPREDUCE-5192. Allow for alternate resolutions of TaskCompletionEvents. Contributed by Chris Douglas.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1493445 13f79535-47bb-0310-9956-ffa450edef68
YARN-693. Modified RM to send NMTokens on allocate call so that AMs can then use them for authentication with NMs. Contributed by Omkar Vinit Joshi.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1493448 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9632. TestShellCommandFencer will fail if there is a 'host' machine in the network. Contributed by Chuan Liu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1493451 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-HDFS-4312-trunk-gd