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