YARN-825. Fixed javadoc and annotations for yarn-common module. Contributed by Vinod Kumar Vavilapalli.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1493634 13f79535-47bb-0310-9956-ffa450edef68
YARN-826. Moved Clock and SystemClock into yarn.util package. Contributed by Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1493639 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9649. Promoted YARN service life-cycle libraries into Hadoop Common for usage across all Hadoop projects. Contributed by Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1493650 13f79535-47bb-0310-9956-ffa450edef68
YARN-833. Moved Graph and VisualizeStateMachine into yarn.state package. Contributed by Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1493654 13f79535-47bb-0310-9956-ffa450edef68