YARN-2204. TestAMRestart#testAMRestartWithExistingContainers assumes CapacityScheduler. (Robert Kanter via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1605548 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6595. Allow the maximum threads for balancing on datanodes to be configurable. Contributed by Benoy Antony


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1605565 13f79535-47bb-0310-9956-ffa450edef68