-d keeps false running jobs

[baminou]

When using -d to execute and specify the minimum space to run a job, I had a bug.
Steps:

1. Running the executor with -d 500
2. Space on the VM goes under 500 so no more jobs are picked up
3. Freeing some space so the VM space goes over 500
4. Some jobs are still marked as running, but the number of tasks is still at 0

It might be hard to reproduce.

[junjun-zhang]

@baminou this should have been fixed, please make sure the latest JT-CLI is used.