Description of problem:

periodic-tripleo-ci-rhel-9-ovb-3ctlr_1comp-featureset035-internal-rhos-17.1 failing consistently with set of tempest tests with below traceback :

Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/keystone_tempest_plugin/tests/api/identity/v3/test_oauth1_tokens.py", line 145, in test_authorize_request_token
    request_token = self._create_request_token(consumer)
  File "/usr/lib/python3.9/site-packages/keystone_tempest_plugin/tests/api/identity/v3/test_oauth1_tokens.py", line 41, in _create_request_token
    request_token = self.oauth_token_client.create_request_token(
  File "/usr/lib/python3.9/site-packages/tempest/lib/services/identity/v3/oauth_token_client.py", line 130, in create_request_token
    resp, body = self.post(endpoint,
  File "/usr/lib/python3.9/site-packages/tempest/lib/common/rest_client.py", line 299, in post
    return self.request('POST', url, extra_headers, headers, body, chunked)
  File "/usr/lib/python3.9/site-packages/tempest/lib/common/rest_client.py", line 720, in request
    self._error_checker(resp, resp_body)
  File "/usr/lib/python3.9/site-packages/tempest/lib/common/rest_client.py", line 810, in _error_checker
    raise exceptions.UnexpectedContentType(str(resp.status),
tempest.lib.exceptions.UnexpectedContentType: Unexpected content type provided
Details: 500