YARN-888. Cleaned up POM files so that non-leaf modules don't include any dependencies and thus compact the dependency list for leaf modules. Contributed by Alejandro Abdelnur.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1557801 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5710. FSDirectory#getFullPathName should check inodes against null. Contributed by Uma Maheswara Rao G.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1557803 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5579. Under construction files make DataNode decommission take very long hours. Contributed by zhaoyunjiong.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1557904 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch: upstream/trunk