+++ This bug was initially created as a clone of Bug #2222058 +++

Description of problem:
If another admin user exist in another domain beside the default one, deployment consistently fails
in tripleo-keystone-resources role because of the "Multiple matches found for admin" error.

```
2023-07-11 12:34:56,789 p=123456 u=mistral n=ansible | TASK [tripleo-keystone-resources : Assign admin role to admin project for admin user] ***
2023-07-11 12:34:56,789 p=123456 u=mistral n=ansible | Tuesday 11 July 2023  12:34:56 +0000 (0:00:01.234)       XX:XX:XX.XXX ********** 
2023-07-11 12:34:56,789 p=123456 u=mistral n=ansible | fatal: [undercloud]: FAILED! => {"changed": false, "msg": "Multiple matches found for admin"}
```


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


How reproducible:
Always

Steps to Reproduce:
1. Create a non-default domain
2. Create an "admin" user in that domain
3. Run deployment

Actual results:
Deployment consistently fails

Expected results:
Deployment succeeds without errors

Additional info: