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/trunk@1544239 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5473. Consistent naming of user-visible caching classes and methods (cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1544252 13f79535-47bb-0310-9956-ffa450edef68
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/trunk@1544266 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5543. Fix narrow race condition in TestPathBasedCacheRequests (cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1544310 13f79535-47bb-0310-9956-ffa450edef68