Document import: subject `creator` is unexpected

[PascalRepond]

Bug description:

When importing a document with a subject of type Work that has a creator (MARC subfield ?), the importer tries to create a subfield subjects_imported.entity.creator that is not accepted by the jsonschema. This creates an error when trying to save the document.

Relates to

• Sentry: RERO-ILS-53M
• RT: 623

Expected behavior:

In this case, the document importer should create a unique authorized_access_point from the MARC fields without creating an invalid "creator" subfield in the json.

Format of the authorized access point : TO BE DEFINED

Steps to Reproduce:

1. Try to import this document from SLSP : https://ils.test.rero.ch/professional/records/documents/new?source=slsp&pid=991171187128205501
2. Check "network" inspector and see the incorrect json
3. Try to save and see the error

Version:

v1.18.0

Anything else?

⚠️ : Check that other importer versions (LoC, etc...) also avoid this error.

[PascalRepond]

Exact specifications for work subjects imports should be clarified between @rerowep and @Ewa666