Description of problem:
'tempest cleanup' reports authorization error when running cleanup after test runs

What problem/issue/behavior are you having trouble with?  What do you expect to see?

'tempest cleanup' reports authorization error when running cleanup after test runs. Only noticed to occur when running tests using the heat plugin.

(engcloud) [stack@director tempest]$ tempest cleanup
Begin cleanup
Process 18 projects
Cleaning project:  d5da6cf0b2d8442586875880559d4481-fc5be417-89c4-471e-bff4-edddd33
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/tempest/cmd/cleanup.py", line 112, in take_action
    self._cleanup()
  File "/usr/lib/python2.7/site-packages/tempest/cmd/cleanup.py", line 175, in _cleanup
    self._clean_project(project)
  File "/usr/lib/python2.7/site-packages/tempest/cmd/cleanup.py", line 217, in _clean_project
    **kwargs))
  File "/usr/lib/python2.7/site-packages/tempest/common/credentials_factory.py", line 298, in get_credentials
    **params)
  File "/usr/lib/python2.7/site-packages/tempest/lib/auth.py", line 648, in get_credentials
    creds = auth_provider.fill_credentials()
  File "/usr/lib/python2.7/site-packages/tempest/lib/auth.py", line 124, in fill_credentials
    auth_data = self.get_auth()
  File "/usr/lib/python2.7/site-packages/tempest/lib/auth.py", line 150, in get_auth
    self.set_auth()
  File "/usr/lib/python2.7/site-packages/tempest/lib/auth.py", line 159, in set_auth
    self.cache = self._get_auth()
  File "/usr/lib/python2.7/site-packages/tempest/lib/auth.py", line 314, in _get_auth
    token, auth_data = auth_func(**auth_params)
  File "/usr/lib/python2.7/site-packages/tempest/lib/services/identity/v3/token_client.py", line 181, in get_token
    body = self.auth(**kwargs)
  File "/usr/lib/python2.7/site-packages/tempest/lib/services/identity/v3/token_client.py", line 132, in auth
    resp, body = self.post(self.auth_url, body=body)
  File "/usr/lib/python2.7/site-packages/tempest/lib/common/rest_client.py", line 279, in post
    return self.request('POST', url, extra_headers, headers, body, chunked)
  File "/usr/lib/python2.7/site-packages/tempest/lib/services/identity/v3/token_client.py", line 161, in request
    raise exceptions.Unauthorized(resp_body['error']['message'])
Unauthorized: Unauthorized
Details: The request you have made requires authentication.

(engcloud) [stack@director tempest]$ openstack project list --long
+----------------------------------+------------------------------------------------------------------+----------------------------------+-----------------------------------+---------+
| ID                               | Name                                                             | Domain ID                        | Description                       | Enabled |
+----------------------------------+------------------------------------------------------------------+----------------------------------+-----------------------------------+---------+
| 01de83ce02004f4da8ef29a227189ad9 | d5da6cf0b2d8442586875880559d4481-fc5be417-89c4-471e-bff4-edddd33 | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| 19bc9ab03bd74df0aae536a6b2299207 | d5da6cf0b2d8442586875880559d4481-5041044f-5420-4815-8733-1ddbcf8 | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| 25edc75d1146485981f9072ef27a6c48 | d5da6cf0b2d8442586875880559d4481-ec74e469-c36c-45fb-9760-48cc970 | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| 29845792d8654202afe11cc02525ab75 | admin                                                            | default                          | admin tenant                      | True    |
| 2fa4c6d547004df1871efe83e86b9617 | d5da6cf0b2d8442586875880559d4481-93285bd5-080c-46a9-8255-d48ed1a | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| 3dfbd8e3141149c3bdbb902e658422b4 | d5da6cf0b2d8442586875880559d4481-6da0b1b1-7629-4c88-a44d-f09eab8 | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| 3ec266e0162d447c805ee7a3ac2f4bc2 | d5da6cf0b2d8442586875880559d4481-189c0eb5-281d-4d24-bf1b-8491de9 | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| 65415adbcaac42d1b67620717e6401bd | d5da6cf0b2d8442586875880559d4481-60ba1f8b-5465-4e1b-88e9-886d985 | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| 672529ea19d14f7582a703c163646803 | service                                                          | default                          | Tenant for the openstack services | True    |
| 77d733d1e0774173b691fb628545466f | project2                                                         | bde7454715144b3d875f6e2b8b9af6ce |                                   | True    |
| 864645bbf2e94b679ec319601297d652 | project1                                                         | bde7454715144b3d875f6e2b8b9af6ce |                                   | True    |
| 8aa289cd6c024708a45a6b10a01e1fff | d5da6cf0b2d8442586875880559d4481-4ae0652d-929b-4d59-8600-da047b3 | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| 8d502b85a0e843bf94c638f994a2b903 | alt_demo                                                         | default                          | Project for Tempest alt_demo user | True    |
| 979d0c6b4e9a468e9074f1e24edb91a1 | d5da6cf0b2d8442586875880559d4481-5516a755-30b3-4c81-bcfd-02a3d51 | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| a127a899896746c3a82c5dfdad20f157 | d5da6cf0b2d8442586875880559d4481-2c2f0cd5-329b-4fbc-8609-b6238b1 | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| abb89fdb5a084defafae9910737440af | d5da6cf0b2d8442586875880559d4481-d98d99af-d6ea-4aa0-b4b8-65da437 | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| ad17e1ca2d444da7b9368acf93ec1ead | d5da6cf0b2d8442586875880559d4481-55960d7b-d5af-4dcd-8592-2b864ba | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| be0fad4925b048949586652ffebb510c | d5da6cf0b2d8442586875880559d4481-f9957699-ef1d-45ab-a75d-ede04f3 | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| bfd70eec072f41cebc460dbdb1982ee1 | d5da6cf0b2d8442586875880559d4481-8a7ee36d-9522-4cc1-8bb2-a28bf0c | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| c3416b1b9c2d42a9a2ce48a5cd060188 | d5da6cf0b2d8442586875880559d4481-b15903c3-b293-4996-9b24-85a86a6 | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| c57483997a8743f2a98d54e99846c24e | d5da6cf0b2d8442586875880559d4481-ac9fca08-816a-4ff5-9673-bb3086d | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| cc80d87c98af4f8bb8e0777c1fa58ca7 | d5da6cf0b2d8442586875880559d4481-c50fa6f6-ceec-46df-8393-18acac6 | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
| d5da6cf0b2d8442586875880559d4481 | demo                                                             | default                          | Project for Tempest demo user     | True    |
| eb8770dc05d044859d21b5f6cca43066 | d5da6cf0b2d8442586875880559d4481-64b07b14-ffdd-4219-b2aa-f49f563 | 22cbc8fbc95842f389af5f665d4c9898 | Heat stack user project           | True    |
+----------------------------------+------------------------------------------------------------------+----------------------------------+-----------------------------------+---------+

Where are you experiencing the behavior?  What environment?

OSP 13.0.8.
Tempest installed on the director and the tests are executed on the overcloud.

(engcloud) [stack@director-eng eng-tempest]$ rpm -qa | grep tempest
python2-neutron-tests-tempest-0.0.1-0.20180425142847.02a5e2b.el7ost.noarch
python2-keystone-tests-tempest-0.0.1-1.0.564670bgit.el7ost.noarch
python2-tempest-18.0.0-10.el7ost.noarch
python2-heat-tests-tempest-0.3.0-1.el7ost.noarch
python2-novajoin-tests-tempest-0.0.1-0.20180219103837.59d7ba6.el7ost.noarch
python2-cinder-tests-tempest-0.0.1-1.0.aafbdf8git.el7ost.noarch
python2-horizon-tests-tempest-0.0.1-0.20180219094157.a23f407.el7ost.noarch
openstack-tempest-18.0.0-10.el7ost.noarch
python2-tempestconf-2.2.0-1.el7ost.noarch

When does the behavior occur? Frequently?  Repeatedly?   At certain times?
Repeatedly