Create a new database and return a new url representing
        a connection to the new database

def _database_create(self, engine, database):
        """Create a new database and return a new url representing
        a connection to the new database
        """
        logger.info('Creating database "%s" in "%s"', database, engine)
        database_operation(engine, 'create', database)
        url = copy(engine.url)
        url.database = database
        return str(url)