Create interface templates

[Zxanthar98]

[Zxanthar98]

Router configuration templatization needs to be completed. Playbook configuration staged in render playbook, however jinja2 template is incomplete. This might be a good opportunity to break the router configuration template into smaller pieces.

[Zxanthar98]

The creation of interface templates will allow for a single point of config, so long as the correct interfaces are using the correct templates.