HDFS-4686. Update quota computation for rename and INodeReference.  Contributed by Jing Zhao


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2802@1471647 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4729. Fix OfflineImageViewer and permission checking for snapshot operations.  Contributed by Jing Zhao


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2802@1471665 13f79535-47bb-0310-9956-ffa450edef68