chore: upgrade java generator to version 7.3.0

[MalteBellmann]

Related Issue or Design Document

fixes https://github.com/ory/hydra-client-java/issues/19

Checklist

• [x] I have read the contributing guidelines and signed the CLA.
• [x] I have referenced an issue containing the design document if my change introduces a new feature.
• [x] I have read the security policy.
• [x] I confirm that this pull request does not address a security vulnerability. If this pull request addresses a security vulnerability, I confirm that I got approval (please contact security@ory.sh) from the maintainers to push the changes.
• [ ] I have added tests that prove my fix is effective or that my feature works.
• [ ] I have added the necessary documentation within the code base (if appropriate).

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! :)