Description of problem: Wanted to setup a controller (nova in my case) plus compute on same hosts, can't as same host can only be in one host group, controller or compute. Needed mostly for testing or AIO demo setups, but still would be nice to have.

Version-Release number of selected component (if applicable):
openstack-foreman-installer-1.0.4-1.el6ost.noarch

How reproducible:
Every time

Steps to Reproduce:
1. Use foreman to deploy controller host group
2. Try to add compute node on controller's host
3.

Actual results:
Compute node has to reside on another host. 

Expected results:
Add another foreman-installer host group for example: "Nova controller plus compute"

Additional info: