svn merge -c 1585544 Merging from trunk to branch-2 to fix:HDFS-6191. Disable quota checks when replaying edit log. Contributed by Kihwal Lee.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1585545 13f79535-47bb-0310-9956-ffa450edef68