TEZ-939. Fix build break caused by changes in YARN-1824. (sseth)
TEZ-940. Fix a memory leak in TaskSchedulerAppCallbackWrapper.
Contributed by Gopal V and Siddharth Seth.
TEZ-851. Handle failure to persist events to HDFS. (hitesh)
TEZ-944. Tez Job gets "Could not load native gpl library" Error. (hitesh)