[jdk11u-dev] RFR: 8315761: Open source few swing JList and JMenuBar tests

[Andrew Lu]

I backport this for parity with 11.0.23-oracle.

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

Commit messages:
 - Backport bb6b3f2486b07a6ccdeea18519453e6d9c05c2c3

Changes: https://git.openjdk.org/jdk11u-dev/pull/2487/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2487&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315761
  Stats: 249 lines in 4 files changed: 249 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2487.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2487/head:pull/2487

PR: https://git.openjdk.org/jdk11u-dev/pull/2487