YARN-656. In scheduler UI, including reserved memory in Memory Total can make it exceed cluster capacity. (Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1.0-beta@1512487 13f79535-47bb-0310-9956-ffa450edef68
YARN-1046. Disable mem monitoring my default in MiniYARNCluster (Karthik Kambatla via Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1.0-beta@1512498 13f79535-47bb-0310-9956-ffa450edef68