[code-reflection] RFR: Transform runtime test to JUnit [v5]

[Mourad Abbay]

> Transform runtime test to JUnit.

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

  Move test that requires non-static method source, from TestLambdaOps to a new test class

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Changes:
  - all: https://git.openjdk.org/babylon/pull/578/files
  - new: https://git.openjdk.org/babylon/pull/578/files/6c9ed412..6c19a0e5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=578&range=04
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=578&range=03-04

  Stats: 131 lines in 2 files changed: 88 ins; 43 del; 0 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