qtest.py: Few pylint/style fixes

# Based on qmp.py.

#

import errno

import socket

import string

import os

import subprocess

import qmp.qmp

import qemu

class QEMUQtestProtocol(object):

    def __init__(self, address, server=False):

        """

                 socket_scm_helper=None):

        if name is None:

            name = "qemu-%d" % os.getpid()

        super(QEMUQtestMachine, self).__init__(binary, args, name=name, test_dir=test_dir,

        super(QEMUQtestMachine,

              self).__init__(binary, args, name=name, test_dir=test_dir,

                             socket_scm_helper=socket_scm_helper)

        self._qtest = None

        self._qtest_path = os.path.join(test_dir, name + "-qtest.sock")

    def _base_args(self):