chore: upgrade java generator to version 7.3.0

[MalteBellmann]

Related Issue or Design Document

fixes ory/hydra-client-java#19

Checklist

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Further comments

[aeneasr]

Thank you! We need to make sure the dependencies work correctly - do you have an idea how to test that?

[MalteBellmann]

When updating the pom.xml files, i ran ./scripts/generate.sh and ./scripts/test.sh in a oryd/sdk:v0.0.51 docker container, this worked fine. And, if i understand it correctly, these will also run on CI once merged to master (or at the next spec update). I also tested the hydra client locally in my project, also worked fine.

A better solution would probably be integration tests in this or another repository that use the generated clients with an instance of the respective service, do you guys have such a setup?

[aeneasr]

Thank you! :)