YARN-1010. FairScheduler: decouple container scheduling from nodemanager heartbeats. (Wei Yan via Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1528195 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5544. JobClient#getJob loads job conf twice. (Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1528197 13f79535-47bb-0310-9956-ffa450edef68
YARN-1228. Clean up Fair Scheduler configuration loading. (Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1528203 13f79535-47bb-0310-9956-ffa450edef68