RFR: build: update to JUnit 5.7.1 [v2]

[Erik Helin]

> Hi all,
> 
> please review this patch that updates JUnit to version `5.7.1` (and JUnit Platform to `1.7.1`).
> 
> Thanks,
> Erik

Erik Helin has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

-------------

Changes:
  - all: https://git.openjdk.java.net/skara/pull/1087/files
  - new: https://git.openjdk.java.net/skara/pull/1087/files/6d59d0e5..6d59d0e5

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=skara&pr=1087&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=skara&pr=1087&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/skara/pull/1087.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/1087/head:pull/1087

PR: https://git.openjdk.java.net/skara/pull/1087