Karthik Kambatla ef59521094 YARN-4526. Make SystemClock singleton so AppSchedulingInfo could use it. (kasha)
(cherry picked from commit d40859fab1ad977636457a6cc96b6a4f9b903afc)

Conflicts:
	hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapred/TestTaskAttemptListenerImpl.java
2016-01-18 10:59:34 +01:00
..