Reverting MAPREDUCE-5028 (commit 1457919)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1458438 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1458466 FIXES: YARN-200. yarn log does not output all needed information, and is in a binary format. Contributed by Ravi Prakash


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1458473 13f79535-47bb-0310-9956-ffa450edef68