MAPREDUCE-5725. Make explicit that TestNetworkedJob relies on the Capacity Scheduler (Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1559884 13f79535-47bb-0310-9956-ffa450edef68
YARN-1616. RMFatalEventDispatcher should log the cause of the event (kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1559903 13f79535-47bb-0310-9956-ffa450edef68