YARN-1283. Fixed RM to give a fully-qualified proxy URL for an application so that clients don't need to do scheme-mangling. Contributed by Omkar Vinit Joshi.
svn merge --ignore-ancestry -c 1530819 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1530820 13f79535-47bb-0310-9956-ffa450edef68