Comment 52 for bug 1873290

THanks for the comments, Jeremy, from the link above, it says:

https://opendev.org/openstack/keystone/commit/7653847a04e56555b8d172a3d5c76a95533cdec7
```
The keystone token model was refactored in the Rocky release. This
  commit only backports the test so that we have test coverage against
  the bug and proves there wasn't a regression in Queens. As such, the
  code changes to token_model.py (where the bug was introduced) are not
  applicable to Pike.
```
so I think the reason you can cherry pick