RFR: 8352682: Opensource JComponent tests

[Prasanta Sadhukhan]

Few JComponent tests are opensourced

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Commit messages:
 - 8352682: Opensource JComponent tests

Changes: https://git.openjdk.org/jdk/pull/24562/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24562&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8352682
  Stats: 270 lines in 3 files changed: 270 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24562.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24562/head:pull/24562

PR: https://git.openjdk.org/jdk/pull/24562