Major refactor to closer align to OpenShift Ansible

In release v0.5.0 we perform a refactor of the code base to make it more closely align with the same methods used by the OpenShift Ansible team.

UPGRADE MIGRATION NOTES

Scripts and commands previously used are likely to require modification.
Playbooks are now located in the playbooks/ directory, but are named
the same as previous.

Additionally, we've moved away from relying on
the group_vars/ directory as we did previously, and instead are focused
on leveraging the --extra-vars functionality of Ansible instead. What this
means for you, is that previous overrides done with a group_vars method
is better served with a separate file containing your override variables, and
passing that file into Ansible via -e "@./inventory/my_vars.yml" for
example. (Note the @ leading a file path or name.)