callback: always pass the job_id
callback: always pass the job_id

Simplify a bit the logic used to prepare a new new job. We now always
pass the job_id. This is what the server expects.

Change-Id: Id16b97ce1e0bc2961b76139a82ad025c180e0128

redhat-cip/dci-ansible,redhat-cip/dci-ansible