Kafo

(I tried to find something like the suggested in the docs of kafo, but failed to find it. Feel free to slap me with the manual if I just didn't search hard enough)

As a foreman user I want to be able to customize a foreman-installation (e.g. by applying additional puppet modules et cetera) by creating a custom scenario that uses an existing scenario (like 'foreman') as a base.

Ideally this would mean that variables from the foreman scenario are used as defaults and overriden by values in my own scenario and that additional files, e.g. migration scripts, are considered during a run.
This would have the advantage not to break when foreman's scenario itself gets updated.