YARN-642. Removed health parameter from ResourceManager /nodes web-service and cleaned the behaviour of the status parameter. Contributed by Sandy Ryza.
svn merge --ignore-ancestry -c 1490890 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1490892 13f79535-47bb-0310-9956-ffa450edef68