Bypass a failure due to the health of Drydock on update_site
or deploy_site if the continue-on-fail param is enetered.
Adds unit tests
Changed operator to be more easily testable
Removed the K8s Health Check for preflight checks. We will add
the functionalities back once we have a clearer view on what
should be checked and validated for the workflow.
Change-Id: Idd6d6b18d762a0284f2041248faa4040c78def3f
3629245b0c