HDFS-4637. INodeDirectory#replaceSelf4Quota may incorrectly convert a newly created directory to an INodeDirectoryWithSnapshot. Contributed by Jing Zhao


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2802@1463075 13f79535-47bb-0310-9956-ffa450edef68