svn merge -c 1468232 FIXES: MAPREDUCE-4974. Optimising the LineRecordReader initialize() method (Gelesh via bobby)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1468235 13f79535-47bb-0310-9956-ffa450edef68
YARN-444. Moved special container exit codes from YarnConfiguration to API where they belong. Contributed by Sandy Ryza.
MAPREDUCE-5151. Updated MR AM to use standard exit codes from the API after YARN-444. Contributed by Sandy Ryza.
svn merge --ignore-ancestry -c 1468276 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1468277 13f79535-47bb-0310-9956-ffa450edef68