fix: job wait respects Ctrl-C

[frrist]

closes #961

[kasteph]

lgtm!

[placer14]

nit.

Suggested change

	select {
	case <-ctx.Done():
	return nil, ctx.Err()
	case <-job.Job.Done():
	break
	}
	// wait on the job to complete
	// wait on the scheduler/job to complete
	select {
	case <-ctx.Done():
	return nil, ctx.Err()
	case <-job.Job.Done():
	break
	}