HADOOP-10717. Revert r1603571.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1603620 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6439. NFS should not reject NFS requests to the NULL procedure whether port monitoring is enabled or not. Contributed by Brandon Li

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1603622 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6559. Fix wrong option "dfsadmin -rollingUpgrade start" in the document. (Contributed by Akira Ajisaka)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1603638 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10711. Cleanup some extra dependencies from hadoop-auth. (rkanter via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1603643 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' into HDFS-2856