RFR: 8306954: Open source five Focus related tests

[Alexander Zuev]

Cleaning up tests:

AsyncUpFocusCycleTest.java
ClearMostRecentFocusOwnerTest.java
ConsumedTabKeyTest.java,
EventRetargetTest.java
ExtraPropChangeNotifVetoingTest.java

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Commit messages:
 - 8306954: Open source five Focus related tests

Changes: https://git.openjdk.org/jdk/pull/13707/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13707&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306954
  Stats: 962 lines in 5 files changed: 962 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/13707.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13707/head:pull/13707

PR: https://git.openjdk.org/jdk/pull/13707