YARN-1284. LCE: Race condition leaves dangling cgroups entries for killed containers. (Alejandro Abdelnur via Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1530492 13f79535-47bb-0310-9956-ffa450edef68
Add missing file TestCgroupsLCEResourcesHandler for YARN-1284.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1530493 13f79535-47bb-0310-9956-ffa450edef68
YARN-976. Document the meaning of a virtual core. (Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1530500 13f79535-47bb-0310-9956-ffa450edef68
Fix position of YARN-461 in CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1530505 13f79535-47bb-0310-9956-ffa450edef68
YARN-1258. Allow configuring the Fair Scheduler root queue (Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1530542 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch: upstream/trunk