Hiera - Mulitple scenarios support

A scenario contains puppet classes and/or any other defined scenario.
The generated puppet classes is then included.

Serves CI/CD purposes and helps with AIO approach.

It's using Hieara YAML by adding scenario and scenarii parameters

Please check data/README.md

The included manifests have to be supported for Roles support.
Another commit to follow providing neutron manifests refactored