Goal: 

• Avoid the naivy solution (delete and create) for the rhel idm child entity, so we manage using 'Save' or 'Update' methods in gorm.

Acceptance Criteria:

• Unit tests pass.
• The related information is updated after a second update with different certificates and servers.

Additional Information:

• https://github.com/podengo-project/idmsvc-backend/pull/39 (FORMER Evoked from MR: https://gitlab.cee.redhat.com/identity-management/idmocp/idm-domains-backend/-/merge_requests/8)