Cannot use all expand options with partijen endpoint generated by OpenAPI

[hsiliev]

Product versie / Product version

2.1

Omschrijf het probleem / Describe the bug

Recomended approach to fetch kontact with BSN in #138 does not seem to work as intended with generated OpenAPI models and client as ExpandPartijAllOfExpand class uses List<Betrokkene> that does not have expanded hadKlantcontact but only foreign keys.

Stappen om te reproduceren / Steps to reproduce

1. Generate Java OpenAPI models and client
2. Fix issues with wrong assignments of List in Partij and ExpandPartij
3. Request Partij with nummer and expand "betrokkenen, betrokkenen.hadKlantcontact"
4. The response does not contain expanded klantcontact

Verwacht gedrag / Expected behavior

ExpandBetrokkenen* is instead documented and used in ExpandPartijAllOfExpand

[joeribekker]

Karin (Dimpact) needs to find budget for this. If this is an issue with the client generation tools, then we're not going to fix it. If it's an issue in the API spec, we can fix it if budget allows it.