YARN-133. Update web services docs for RM clusterMetrics. Contributed by Ravi Prakash.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1439653 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-4838. Add additional fields like Locality, Avataar to the JobHistory logs. Contributed by Zhijie Shen


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1439714 13f79535-47bb-0310-9956-ffa450edef68