Adds tests for default database connection settings. I.E. unconfigured
Adds tests for default database connection settings. I.E. unconfigured

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