[code-reflection] RFR: Transform runtime test to JUnit [v6]

[Mourad Abbay]

> Transform runtime test to JUnit.

Mourad Abbay has updated the pull request incrementally with one additional commit since the last revision:

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  Co-authored-by: Paul Sandoz <paul.d.sandoz at googlemail.com>

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Changes:
  - all: https://git.openjdk.org/babylon/pull/578/files
  - new: https://git.openjdk.org/babylon/pull/578/files/6c19a0e5..b59fcbe2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=578&range=05
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=578&range=04-05

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/babylon/pull/578.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/578/head:pull/578

PR: https://git.openjdk.org/babylon/pull/578