HDFS-4397. Fix a bug in INodeDirectoryWithSnapshot.Diff.combinePostDiff(..) that it may put the wrong node into the deleted list.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2802@1433293 13f79535-47bb-0310-9956-ffa450edef68