Look here [1] for details and reasons

Acceptance criteria:

• All the logic must be written in ansible and the jenkins job should only call the ansible job
• The playbook should be configurable so that is possible to execute it also from a local machine
• It should be possible to use the palybook to create private RPHDS cluster

1. https://github.com/RHCloudServices/centralci/pull/178#issuecomment-552434119