merge YARN-720 and MAPREDUCE-5291 from trunk. container-log4j.properties should not refer to mapreduce properties. Update MRApp to use YARN properties for log setup. Contributed by Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1488830 13f79535-47bb-0310-9956-ffa450edef68