HDFS-4680. Audit logging of delegation tokens for MR tracing. (Andrew Wang)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1-beta@1522047 13f79535-47bb-0310-9956-ffa450edef68
YARN-1176. RM web services ClusterMetricsInfo total nodes doesn't include unhealthy nodes (Jonathan Eagles via tgraves)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1-beta@1522068 13f79535-47bb-0310-9956-ffa450edef68