Set up modular integration tests

[beatngu13]

This issue stems from #539. To ensure Pioneer's compatability with JPMS, we have to set up modular integration tests and execute them during our build.

Open for discussion: should these tests be a separate module, a separate project, … ?

Helpful links:

• https://docs.gradle.org/7.3/userguide/java_testing.html#sec:java_testing_modular
• https://sormuras.github.io/blog/2018-09-11-testing-in-the-modular-world

[Bukama]

I vote for @sormuras to implement that 👼

[Bukama]

link to #617

[Bukama]

@beatngu13 Is this still relevant, when upgrading to Java 11 (in #627)

[beatngu13]

Yes, tests might pass on the class path, but fail on the module path.

[nipafx]

@beatngu13 If you want, you can start a new branch based on #627 and start experimenting with the integration tests there.

[Bukama]

@beatngu13 wasn't that also done with #651 ?

[beatngu13]

@Bukama you are right, this should be done now. 🥳