YARN-1933. Fixed test issues with TestAMRestart and TestNodeHealthService. Contributed by Jian He.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1587104 13f79535-47bb-0310-9956-ffa450edef68
YARN-1928. Fixed a race condition in TestAMRMRPCNodeUpdates which caused it to fail occassionally. Contributed by Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1587114 13f79535-47bb-0310-9956-ffa450edef68