After integrating with placement, there are two deployment mode:
* Hybrid mode: a compute host resource provider is managed by both
nova-compute and zun-compute.
* Standalone mode: a compute host resource provider is managed by
zun-compute solely.
This commit adds a job for testing standalone mode. The hybrid mode
is covered by existing jobs.
Depends-On: https://review.opendev.org/#/c/677094/
Change-Id: I756040f307d12c93bfecfe33ff52222f3a0bfbbe
815611705b