[jdk11u-dev] RFR: 8307381: Open Source JFrame, JIF related Swing Tests

[Andrew Lu]

I backport this for parity with 11.0.23-oracle.

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

Commit messages:
 - Backport 4386d42d31af9042121581cd3fd4d5a7cf8961e6

Changes: https://git.openjdk.org/jdk11u-dev/pull/2449/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2449&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8307381
  Stats: 354 lines in 6 files changed: 354 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2449.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2449/head:pull/2449

PR: https://git.openjdk.org/jdk11u-dev/pull/2449