Adding provisioning for vagrant vm
1. Simply do "grunt mongo_up" to bring-up a mongodb vm provisioned w/ a mongodb docker container listening at http://172.12.8.155:28017/ (27017 for mongodb:// connections)
2. "grunt mongo_reset" to delete and re-create the mongo instance
3. The db data is never wiped, it is stored in the services/mongodb/db folder of the developer!