HDFS-5168. Add cross node dependency support to BlockPlacementPolicy.  Contributed by Nikola Vujic


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1592179 13f79535-47bb-0310-9956-ffa450edef68
YARN-1201. TestAMAuthorization fails with local hostname cannot be resolved. (Wangda Tan via junping_du)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1592197 13f79535-47bb-0310-9956-ffa450edef68