YARN-777. Removed unreferenced objects from .proto files. Contributed by Jian He.
svn merge --ignore-ancestry -c 1490882 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1490887 13f79535-47bb-0310-9956-ffa450edef68
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
Merge remote branch 'origin/branch-2' into branch-2-gd
Merge remote branch 'origin/branch-2-gd' into fb-MAPREDUCE-4884-branch-2-gd