Pillar data should exist in wsuwp production as well

It's entirely possible that we'll merge the WSUWP production and vagrant minions shortly.
Better describe naming convention of minion configuration

This also implies that we're merging the WSUWP vagrant and production configs, which we'll do in the next commit.
Add a unified WSUWP minion configuration

The existing production and vagrant configs will be removed shortly once that project has been modified to work properly with this configuration.