def poll(self, _deadstate=None):
        if self.sts < 0:
            result = self._popen.poll(_deadstate)
            if result is not None:
                self.sts = result
        return self.sts
Test that we can add an image via the swift backend with
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/popen2.py/Popen3.poll--crossover with--dataset/ETHPy150Open openstack/glance_store/glance_store/tests/unit/test_swift_store.py/SwiftTests.test_add_auth_url_variations