Use geocoder stubs in specs

By adding stubs and latitude/longitude values for the factories, we no longer need to rely on the Google Maps API to run tests.
Use underscores in DB names for consistency

Also removed mongoid.yml which is no longer used and somehow didn't get deleted.
Fix Rubocop offenses in unicorn.rb
Merge pull request #13 from smcgov/use-geocoder-stubs-for-specs

Use geocoder stubs for specs