Job.status never changes

[DanielEidlin]

Describe the bug
Job.status never changes, it always stays Running.

To Reproduce

1. call set_success_status, set_failure_status or set_error_status on a job instance.
2. Notice how Job.status's value is Running instead of Completed, Failed or ErrorThrown respectively.

Expected behavior
Job.status should change when calling one of the state-changing functions mentioned above.