Added unit tests for run_job().
Added unit tests for run_job().


Former-commit-id: a407299156458ed4fdd340e519c4ea463a3e3ec8 [formerly a3062a3485f85a677af60f5c6481e32e455b4d8d]
Former-commit-id: 81e883500cec0059c8993858055f7b2356520e3f
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine