RFR: 8315602: Open source swing security manager test

[Prasanta Sadhukhan]

A security manager swing test is open sourced

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Commit messages:
 - 8315602: Open source swing security manager test

Changes: https://git.openjdk.org/jdk/pull/15597/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15597&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315602
  Stats: 55 lines in 1 file changed: 55 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/15597.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15597/head:pull/15597

PR: https://git.openjdk.org/jdk/pull/15597