HDFS-4762 Provide HDFS based NFSv3 and Mountd implementation. Contributed by Brandon Li

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1499029 13f79535-47bb-0310-9956-ffa450edef68
Add the missed file in commit r1499029

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1499041 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9681. FileUtil.unTarUsingJava() should close the InputStream upon finishing. Contributed by Chuan Liu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1499069 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd