HDFS-6794. Update BlockManager methods to use DatanodeStorageInfo where possible. (Arpit Agarwal)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1615169 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10902. Deletion of directories with snapshots will not output reason for trash move failure. Contributed by Stephen Chu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1615171 13f79535-47bb-0310-9956-ffa450edef68
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
HDFS-6788. Improve synchronization in BPOfferService with read write lock. Contributed by Yongjun Zhang.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1615190 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6482. Use block ID-based block layout on datanodes (James Thomas via Colin Patrick McCabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1615223 13f79535-47bb-0310-9956-ffa450edef68