Connection to keystone refused during tempest

[Marian Gasparovic]

When running tempest on single node deployment we encountered

2023-09-23-16:19:21 keystoneauth.session DEBUG REQ: curl -g -i -X GET http://10.246.64.200/openstack-keystone -H "Accept: application/json" -H "User-Agent: openstacksdk/0.61.0 keystoneauth1/4.4.0 python-requests/2.25.1 CPython/3.10.12"
2023-09-23-16:19:21 urllib3.connectionpool DEBUG Starting new HTTP connection (1): 10.246.64.200:80
2023-09-23-16:19:21 keystoneauth.identity.generic.base WARNING Failed to discover available identity versions when contacting http://10.246.64.200/openstack-keystone. Attempting to parse version from URL.
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 169, in _new_conn
    conn = connection.create_connection(
  File "/usr/lib/python3/dist-packages/urllib3/util/connection.py", line 96, in create_connection
    raise err
  File "/usr/lib/python3/dist-packages/urllib3/util/connection.py", line 86, in create_connection
    sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused

10.246.64.200 is public IP

https://oil-jenkins.canonical.com/job/fce_deploy_sunbeam/556//console
artifacts
https://oil-jenkins.canonical.com/artifacts/f970618e-5224-4083-aed2-8f838d5b8965/index.html