stub mongoose connection, not to do real connection to mongodb
stub mongoose connection, not to do real connection to mongodb

h091237557/keanux-personal,kirkchen/keanux-personal,CityRay/keanux-personal,Keanux/keanux-personal,kirkchen/keanux-personal,CityRay/keanux-personal,Wolke/keanux-personal,keanyc/keanux-personal,Keanux/keanux-personal,keanyc/keanux-personal,h091237557/keanux-personal,Wolke/keanux-personal