EditMOM 3 can call the `save` service even when user session is expired
Created by: GVogeler
i.e. in the 30sec. befor EditMOM-3 tests the session as introduced by https://github.com/icaruseu/mom-ca/pull/571 EditMOM-3 saves a charter with atom:author/atom:email='guest'. This occured several times with very active users in the last year.