YARN-2012. Fair Scheduler: allow default queue placement rule to take an arbitrary queue (Ashwin Shankar via Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1597205 13f79535-47bb-0310-9956-ffa450edef68
YARN-2059. Added admin ACLs support to Timeline Server. Contributed by Zhijie Shen.
svn merge --ignore-ancestry -c 1597207 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1597208 13f79535-47bb-0310-9956-ffa450edef68
YARN-2073. Fair Scheduler: Add a utilization threshold to prevent preempting resources when cluster is free (Karthik Kambatla via Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1597210 13f79535-47bb-0310-9956-ffa450edef68
YARN-2096. Race in TestRMRestart#testQueueMetricsOnRMRestart. (Anubhav Dhoot via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1597225 13f79535-47bb-0310-9956-ffa450edef68