svn merge -c 1527015 FIXES: MAPREDUCE-5332. Support token-preserving restart of history server. Contributed by Jason Lowe


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1527016 13f79535-47bb-0310-9956-ffa450edef68
Merge -c 1527033 from trunk to branch-2 to fix MAPREDUCE-5531. Fix compat with hadoop-1 in mapreduce.(TaskID, TaskAttemptID) by re-introducing missing constructors. Contributed by Robert Kanter.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1527034 13f79535-47bb-0310-9956-ffa450edef68
svn commit -c 1527037 FIXES: MAPREDUCE-5545. org.apache.hadoop.mapred.TestTaskAttemptListenerImpl.testCommitWindow times out. Contributed by Robert Kanter


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1527039 13f79535-47bb-0310-9956-ffa450edef68