def tearDown(self):
        super(SimpleInstanceTest, self).tearDown()
        CONF.network_label_regex = self.orig_conf
        CONF.ip_start = None
def _resetExpect(self):
        self.previousExpectLine = ""
        if self._connection is not None and isinstance(self._connection.buffer, str):
            self.previousExpectLine = self._connection.buffer 
            self._connection.buffer = ""