[code-reflection] RFR: Transform runtime test to JUnit [v7]

[Mourad Abbay]

> Transform runtime test to JUnit.

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

  Optimize imports in runtime tests (using IntelliJ)

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Changes:
  - all: https://git.openjdk.org/babylon/pull/578/files
  - new: https://git.openjdk.org/babylon/pull/578/files/b59fcbe2..4702d391

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=578&range=06
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=578&range=05-06

  Stats: 33 lines in 5 files changed: 14 ins; 10 del; 9 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