YARN-217. Fix RMAdmin protocol description to make it work in secure mode also. Contributed by Devaraj K.
svn merge --ignore-ancestry -c 1429683 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1429684 13f79535-47bb-0310-9956-ffa450edef68