RFR: 8305942: Open source several AWT Focus related tests

[Prasanta Sadhukhan]

This opensources several other AWT Focus related tests.
CI runs are ok.

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Commit messages:
 - 8305942: Open source several AWT Focus related tests

Changes: https://git.openjdk.org/jdk/pull/13527/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13527&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305942
  Stats: 839 lines in 6 files changed: 839 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/13527.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13527/head:pull/13527

PR: https://git.openjdk.org/jdk/pull/13527