def tearDown(self):
        super(SimpleInstanceTest, self).tearDown()
        CONF.network_label_regex = self.orig_conf
        CONF.ip_start = None
def _lastExpect(self):
        constructLine = self.previousExpectLine
        if self._connection is not None and isinstance(self._connection.before, str):
            constructLine += self._connection.before
        if self._connection is not None and isinstance(self._connection.after, str):
            constructLine += self._connection.after
        return  constructLine