Move seed script gems out of default group
Move seed script gems out of default group

Resolves #1165
- undid changes from Heroku implementation (#275)

YaleSTC/reservations,Amalanag/reservations,Amalanag/reservations,Amalanag/reservations,YaleSTC/reservations,YaleOutdoors/reservations,YaleOutdoors/reservations,YaleOutdoors/reservations,YaleSTC/reservations