Bug 1728151

Description of problem:

When we run
 $ tempest cleanup --init-saved-state
according to the product documentation[1], we see that it is requesting
Keystone v2 api to list role, which is ignored inside command.

[1] https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html/openstack_integration_test_suite_guide/chap-clean-tempest-resources

We see the following ERROR in tempest.log

~~~
2019-07-09 02:38:29.955 32177 INFO tempest.lib.common.rest_client [req-e88b41a5-7811-4fb3-85e7-9e41ac6412b5 ] Request (main): 404 GET http://192.168.24.7:35357/v2.0/OS-KSADM/roles 0.138s
2019-07-09 02:38:29.955 32177 DEBUG tempest.lib.common.rest_client [req-e88b41a5-7811-4fb3-85e7-9e41ac6412b5 ] Request - Headers: {'Content-Type': 'application/json', 'Accept': 'application/json', 'X-Auth-Token'
: '<omitted>'}
        Body: None
    Response - Headers: {'status': '404', u'content-length': '142', 'content-location': 'http://192.168.24.7:35357/v2.0/OS-KSADM/roles', u'vary': 'X-Auth-Token', u'server': 'Apache', u'connection': 'close', u'da
te': 'Tue, 09 Jul 2019 06:38:29 GMT', u'content-type': 'application/json', u'x-openstack-request-id': 'req-e88b41a5-7811-4fb3-85e7-9e41ac6412b5'}
        Body: {"error": {"message": "(http://192.168.24.7:35357/v2.0/OS-KSADM/roles): The resource could not be found.", "code": 404, "title": "Not Found"}} _log_request_full /usr/lib/python2.7/site-packages/tem
pest/lib/common/rest_client.py:434
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service [-] Cannot retrieve Roles.: NotFound: Object not found
Details: {u'message': u'(http://192.168.24.7:35357/v2.0/OS-KSADM/roles): The resource could not be found.', u'code': 404, u'title': u'Not Found'}
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service Traceback (most recent call last):
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service   File "/usr/lib/python2.7/site-packages/tempest/cmd/cleanup_service.py", line 839, in list
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service     roles = self.client.list_roles()['roles']
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service   File "/usr/lib/python2.7/site-packages/tempest/lib/services/identity/v2/roles_client.py", line 59, in list_roles
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service     resp, body = self.get(url)
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service   File "/usr/lib/python2.7/site-packages/tempest/lib/common/rest_client.py", line 294, in get
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service     return self.request('GET', url, extra_headers, headers)
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service   File "/usr/lib/python2.7/site-packages/tempest/lib/common/rest_client.py", line 668, in request
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service     self._error_checker(resp, resp_body)
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service   File "/usr/lib/python2.7/site-packages/tempest/lib/common/rest_client.py", line 774, in _error_checker
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service     raise exceptions.NotFound(resp_body, resp=resp)
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service NotFound: Object not found
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service Details: {u'message': u'(http://192.168.24.7:35357/v2.0/OS-KSADM/roles): The resource could not be found.', u'code': 404, u'title': u'Not Found'}
2019-07-09 02:38:29.956 32177 ERROR tempest.cmd.cleanup_service
~~~

Because of this I'm afraid currently tempest cleanup does not deal with Keystone at all.

Version-Release number of selected component (if applicable):

$ rpm -qa | grep tempest
python2-tempestconf-2.0.0-1.el7ost.noarch
openstack-tempest-18.0.0-7.el7ost.noarch
python2-tempest-18.0.0-7.el7ost.noarch

How reproducible:
Always

Steps to Reproduce:
1. setup tempest according to product doc
2. run "tempest cleanup --init-saved-state "
3. see tempest.log

Actual results:
We see ERROR caused by access to Keystone v2 API

Expected results:
We do not see the ERROR and tempest cleanup command succeeds to list roles

Additional info: