tests are failed on master with"ValueError: Unable to determine whether fp is closed."

[Andriy Kurilin]

Since requests 2.4.0 released, several tests are failed on master with next traceback:

2014-09-01 04:05:08.708 | Traceback (most recent call last):
2014-09-01 04:05:08.708 | File "novaclient/tests/v1_1/test_servers.py", line 223, in test_update_server
2014-09-01 04:05:08.709 | s.update(name='hi')
2014-09-01 04:05:08.709 | File "novaclient/v1_1/servers.py", line 55, in update
2014-09-01 04:05:08.709 | self.manager.update(self, name=name)
2014-09-01 04:05:08.709 | File "novaclient/v1_1/servers.py", line 912, in update
2014-09-01 04:05:08.709 | return self._update("/servers/%s" % base.getid(server), body, "server")
2014-09-01 04:05:08.709 | File "novaclient/base.py", line 113, in _update
2014-09-01 04:05:08.709 | _resp, body = self.api.client.put(url, body=body)
2014-09-01 04:05:08.709 | File "novaclient/client.py", line 493, in put
2014-09-01 04:05:08.709 | return self._cs_request(url, 'PUT', **kwargs)
2014-09-01 04:05:08.710 | File "novaclient/client.py", line 465, in _cs_request
2014-09-01 04:05:08.710 | resp, body = self._time_request(url, method, **kwargs)
2014-09-01 04:05:08.710 | File "novaclient/client.py", line 439, in _time_request
2014-09-01 04:05:08.710 | resp, body = self.request(url, method, **kwargs)
2014-09-01 04:05:08.710 | File "novaclient/client.py", line 410, in request
2014-09-01 04:05:08.710 | **kwargs)
2014-09-01 04:05:08.710 | File "/home/jenkins/workspace/gate-python-novaclient-python26/.tox/py26/lib/python2.6/site-packages/requests/api.py", line 44, in request
2014-09-01 04:05:08.710 | return session.request(method=method, url=url, **kwargs)
2014-09-01 04:05:08.710 | File "/home/jenkins/workspace/gate-python-novaclient-python26/.tox/py26/lib/python2.6/site-packages/requests/sessions.py", line 448, in request
2014-09-01 04:05:08.710 | resp = self.send(prep, **send_kwargs)
2014-09-01 04:05:08.711 | File "/home/jenkins/workspace/gate-python-novaclient-python26/.tox/py26/lib/python2.6/site-packages/requests_mock/mocker.py", line 67, in _fake_send
2014-09-01 04:05:08.711 | return self._real_send(session, request, **kwargs)
2014-09-01 04:05:08.711 | File "/home/jenkins/workspace/gate-python-novaclient-python26/.tox/py26/lib/python2.6/site-packages/requests/sessions.py", line 591, in send
2014-09-01 04:05:08.711 | r.content
2014-09-01 04:05:08.711 | File "/home/jenkins/workspace/gate-python-novaclient-python26/.tox/py26/lib/python2.6/site-packages/requests/models.py", line 707, in content
2014-09-01 04:05:08.711 | self._content = bytes().join(self.iter_content(CONTENT_CHUNK_SIZE)) or bytes()
2014-09-01 04:05:08.711 | File "/home/jenkins/workspace/gate-python-novaclient-python26/.tox/py26/lib/python2.6/site-packages/requests/models.py", line 638, in generate
2014-09-01 04:05:08.711 | for chunk in self.raw.stream(chunk_size, decode_content=True):
2014-09-01 04:05:08.711 | File "/home/jenkins/workspace/gate-python-novaclient-python26/.tox/py26/lib/python2.6/site-packages/requests/packages/urllib3/response.py", line 255, in stream
2014-09-01 04:05:08.712 | while not is_fp_closed(self._fp):
2014-09-01 04:05:08.712 | File "/home/jenkins/workspace/gate-python-novaclient-python26/.tox/py26/lib/python2.6/site-packages/requests/packages/urllib3/util/response.py", line 22, in is_fp_closed
2014-09-01 04:05:08.712 | raise ValueError("Unable to determine whether fp is closed.")
2014-09-01 04:05:08.712 | ValueError: Unable to determine whether fp is closed.

Related to: py26, py27, py33
Tracebacks of all failed tests: http://paste.openstack.org/show/104193/
Full logs: http://logs.openstack.org/91/117591/3/check/gate-python-novaclient-python26/ab2eea5/console.html