HDFS-6487. TestStandbyCheckpoint#testSBNCheckpoints is racy. Contributed by Mit Desai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1601016 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6497. Make TestAvailableSpaceVolumeChoosingPolicy deterministic (cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1601035 13f79535-47bb-0310-9956-ffa450edef68
YARN-2122. In AllocationFileLoaderService, the reloadThread should be created in init() and started in start(). (Robert Kanter via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1601045 13f79535-47bb-0310-9956-ffa450edef68
YARN-2128. FairScheduler: Incorrect calculation of amResource usage. (Wei Yan via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1601050 13f79535-47bb-0310-9956-ffa450edef68