HDFS-5519. COMMIT handler should update the commit status after sync. Contributed by Brandon Li

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1542437 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5502. Fix HTTPS support in HsftpFileSystem. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1542438 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5373. TestFetchFailure.testFetchFailureMultipleReduces could fail intermittently (jeagles)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1542456 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch: upstream/trunk