YARN-1592. CapacityScheduler tries to reserve more than a node's total memory on branch-0.23. Contributed by Omkar Vinit Joshi and Thomas Graves


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1559184 13f79535-47bb-0310-9956-ffa450edef68