Extracts db from MONGODB_HOST if it is a mongodb URI
Extracts db from MONGODB_HOST if it is a mongodb URI

gerasim13/flask-mongoengine-1,losintikfos/flask-mongoengine,rochacbruno/flask-mongoengine,quokkaproject/flask-mongoengine,losintikfos/flask-mongoengine,quokkaproject/flask-mongoengine,gerasim13/flask-mongoengine-1,rochacbruno/flask-mongoengine