Adding a new job for OSCORE CI

The patch creates the job for salt-formula OSCORE CI performs the below:

* creates snapshot of xenial/nightly repo
* executes jenkins job with defined OpenStack releases each job for one
  release in parallel mode against stable formula revision;
* if ALL test passed then notify/promote the snapshot further

Change-Id: I71ef9b6a196244ecc17bfa0725e106c503c82a9a
1 file changed