SQOOP-826: Add log4j test configuration to all maven modules

(Jarek Jarcec Cecho via Cheolsoo Park)
SQOOP-812: Serialization of Configuration objects to and from json is not working properly

(Jarek Jarcec Cecho via Cheolsoo Park)
SQOOP-813: LoaderExecutor might get into deadlock when exception is raised outside Loader itself

(Jarek Jarcec Cecho via Cheolsoo Park)
SQOOP-643: Implement simple listings for connector and job objects rek

(Jarcec Cecho via Cheolsoo Park)