RFR: 8328238: Convert few closed manual applet tests to main

[Prasanta Sadhukhan]

Few closed manual applet tests are converted to main based and opensourced

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Commit messages:
 - 8328238: Convert few closed manual applet tests to main

Changes: https://git.openjdk.org/jdk/pull/18390/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18390&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328238
  Stats: 396 lines in 4 files changed: 396 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/18390.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18390/head:pull/18390

PR: https://git.openjdk.org/jdk/pull/18390