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