HADOOP-9921. daemon scripts should remove pid file on stop call after stop or process is found not running ( Contributed by Vinayakumar B)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1610964 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10824. Refactor KMSACLs to avoid locking. (Benoy Antony via umamahesh)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1610969 13f79535-47bb-0310-9956-ffa450edef68