YARN-773. Moved YarnRuntimeException from package api.yarn to api.yarn.exceptions. Contributed by Jian He.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1492903 13f79535-47bb-0310-9956-ffa450edef68
YARN-692. Creating NMToken master key on RM and sharing it with NM as a part of RM-NM heartbeat. Contributed by Omkar Vinit Joshi.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1492907 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