gate through UnauthorizedError for functional test

gate through zaqarclient.transport.errors.UnauthorizedError while executing functional tests.
I face the same issue while executing functional tests using nose framework.

Traceback (most recent call last):
  File "/opt/stack/python-zaqarclient/zaqarclient/tests/queues/queues.py", line 268, in test_queue_stats_functional
    queue.post(messages)
  File "/opt/stack/python-zaqarclient/zaqarclient/queues/v1/queues.py", line 129, in post
    self._name, messages)
  File "/opt/stack/python-zaqarclient/zaqarclient/queues/v1/core.py", line 217, in message_post
    resp = transport.send(request)
  File "/opt/stack/python-zaqarclient/zaqarclient/transport/http.py", line 106, in send
    raise self.http_to_zaqar[resp.status_code](msg)
zaqarclient.transport.errors.UnauthorizedError

-------------------- >> begin captured logging << --------------------
stevedore.extension: DEBUG: found extension EntryPoint.parse('queues.v1 = zaqarclient.queues.v1.api:V1')
stevedore.extension: DEBUG: found extension EntryPoint.parse('queues.v1.1 = zaqarclient.queues.v1.api:V1_1')
stevedore.extension: DEBUG: found extension EntryPoint.parse('queues.v1 = zaqarclient.queues.v1.api:V1')
stevedore.extension: DEBUG: found extension EntryPoint.parse('queues.v1.1 = zaqarclient.queues.v1.api:V1_1')
requests.packages.urllib3.connectionpool: INFO: Starting new HTTP connection (1): 10.0.2.15
requests.packages.urllib3.connectionpool: DEBUG: "POST /v1.1/queues/nonono/messages HTTP/1.1" 401 23
stevedore.extension: DEBUG: found extension EntryPoint.parse('queues.v1 = zaqarclient.queues.v1.api:V1')
stevedore.extension: DEBUG: found extension EntryPoint.parse('queues.v1.1 = zaqarclient.queues.v1.api:V1_1')
requests.packages.urllib3.connectionpool: INFO: Resetting dropped connection: 10.0.2.15
requests.packages.urllib3.connectionpool: DEBUG: "DELETE /v1.1/queues/nonono HTTP/1.1" 401 23
--------------------- >> end captured logging << ---------------------