Migrate to JUnit 5

[jzheaux]

[etrandafir93]

hey @jzheaux, can i work on this one as well?

[jzheaux]

Sure thing, @etrandafir93.

[etrandafir93]

@jzheaux - we can use an openrewrite recipe for migrating to junit 5. I have already tried it locally, but it resulted in a lot of changes.
Should we do this module by module? If so, should I create separate PRs?

[jzheaux]

Let's do a simple module first and see what the changes look like.