HADOOP-10111. Allow DU to be initialized with an initial value (Kihwal Lee via jeagles)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1544241 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1544266 FIXES: MAPREDUCE-5631. TestJobEndNotifier.testNotifyRetries fails with Should have taken more than 5 seconds in jdk7. Contributed by Jonathan Eagles


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1544267 13f79535-47bb-0310-9956-ffa450edef68