Runs bcp FORMAT command to create a format file that will assist in creating the bulk data file

def make(self, cmd_args, db_args):
        '''
        Runs bcp FORMAT command to create a format file that will assist in creating the bulk data file
        '''
        with NamedTemporaryFile(delete=True) as f:
            format_file = f.name + '.bcp-format'
        format_args = cmd_args + ['format', NULL_FILE, '-c', '-f', format_file, '-t,'] + db_args
        _run_cmd(format_args)
        self.load(format_file)
        return format_file