HADOOP-10900. CredentialShell args should use single-dash style. (wang)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1615177 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10793. KeyShell args should use single-dash style. (wang)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1615180 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10920. site plugin couldn't parse hadoop-kms index.apt.vm. Contributed by Akira Ajisaka.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1615181 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6802. Some tests in TestDFSClientFailover are missing @Test annotation. Contributed by Akira Ajisaka.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1615183 13f79535-47bb-0310-9956-ffa450edef68