Handle update of present/payment fields separately
Closes no issue
Previous behaviour
Steps to reproduce:
- Put/patch to
http://<url>/api/v1/registrations/<id>/
without permissions - Can change present/payment value of the registration
New behaviour
Steps to validate that it works:
- Put/patch to
http://<url>/api/v1/registrations/<id>/
without permissions - Cannot change present/payment value of the registration