gitlab-ci: reorganization

20 jobs for master in 22 minutes and 40 seconds (queued for 2 seconds)
Name Stage Failure
failed
stretch-le-staging Lets Encrypt Staging
    self.assertEqual(3, len(certlist))
AssertionError: 3 != 4

----------------------------------------------------------------------
Ran 12 tests in 179.520s

FAILED (failures=9)
Cleaning up file based variables
ERROR: Job failed: exit code 1