AMBARI-3644. App.ServiceConfig needs 'defaultsProvider' mechanism. (onechiporenko via srimanth)
AMBARI-3675: Default value of 'Default virtual memory for a job's map-task' is not valid. [Merged] (jaimin)
AMBARI-3687. Default YARN/MR2 AM mem defaults are empty. (srimanth)
AMBARI-3689: Invalid java opts configs in mapred-site. (jaimin)
AMBARI-3697. JS exception trying to calculate dynamic configs in branch-1.4. (srimanth)