Clarify the roles of minions through descriptive naming

Our current `vagrant.conf` and `production.conf` minions need to be named in a better way so that multiple projects can use this repository for provisioning.

* [x] `vagrant.conf` should be `wsuwp-vagrant.conf` as it will be used in [WSUWP Environment](https://github.com/washingtonstateuniversity/WSUWP-Environment)
* [x] `production.conf` should be `wsuwp-production.conf` as it will be used to provision production servers for the [WSUWP Platform](https://github.com/washingtonstateuniversity/wsuwp-platform)