HDFS-5288. Close idle connections in portmap. Contributed by Haohui Mai

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1544352 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5407. Fix typos in DFSClientCache. Contributed by Haohui Mai

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1544362 13f79535-47bb-0310-9956-ffa450edef68
YARN-1320. Fixed Distributed Shell application to respect custom log4j properties file. Contributed by Xuan Gong.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1544364 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5285. Flatten INodeFile hierarchy: Replace INodeFileUnderConstruction and INodeFileUnderConstructionWithSnapshot with FileUnderContructionFeature.  Contributed by jing9


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1544389 13f79535-47bb-0310-9956-ffa450edef68