ON-2719 - Additional tests added for obm job control.
ON-2719 - Additional tests added for obm job control.

As suggested during review, added tests that verify expected
node was selected during Job creation.

(cherry picked from commit 03655a4de4da46edd7f0a2a4bbf2b2f03a39d9d9)

bbcyyb/on-tasks,nortonluo/on-tasks,AlaricChan/on-tasks,AlaricChan/on-tasks,nortonluo/on-tasks,bbcyyb/on-tasks