Tempest test_user_update_own_password is failed

Detailed bug description:
ISO: http://paste.openstack.org/show/493111/
Configuration: [9.0][MOSQA] Tempest 9.0 (VLAN_CEPH_GLANCE_CEPH-TEMPEST, Ceph(api))

Steps to reproduce:
Deploy ISO in configuration see (Detailed bug description)

Expected results:
Test is passed

Actual result:
Test is Failed

Reproducibility:
See attachment

Workaround:
---

Impact:
---

Description of the environment:
See (Detailed bug description)

Additional information:
Error Message

test failed

Stacktrace

Traceback (most recent call last):
  File "tempest/services/identity/v3/json/users_clients.py", line 82, in update_user_password
    resp, _ = self.post('users/%s/password' % user_id, update_user)
  File "tempest/lib/common/rest_client.py", line 259, in post
    return self.request('POST', url, extra_headers, headers, body)
  File "tempest/lib/common/rest_client.py", line 642, in request
    resp, resp_body)
  File "tempest/lib/common/rest_client.py", line 685, in _error_checker
    raise exceptions.Unauthorized(resp_body, resp=resp)
tempest.lib.exceptions.Unauthorized: Unauthorized
Details: {u'message': u'The request you have made requires authentication.', u'code': 401, u'title': u'Unauthorized'}