* keycloak_realm.py: Fix the `ssl_required` parameter according to the API
The `ssl_required` parameter is a string and must be one of 'all',
'external' or 'none'. Passing a bool will make the server return a 500.
* fixup! keycloak_realm.py: Fix the `ssl_required` parameter according to the API
* Update changelogs/fragments/keycloak_realm_ssl_required.yml
Co-authored-by: Felix Fontein <felix@fontein.de>
Co-authored-by: Felix Fontein <felix@fontein.de>