[jdk11u-dev] RFR: 8198619: java/awt/Focus/FocusTraversalPolicy/ButtonGroupLayoutTraversal/ButtonGroupLayoutTraversalTest.java fails on mac

[Martin Doerr]

Backport of JDK-8198619. Fix applies cleanly, but removal from ProblemList had to be done manually. Headful test has passed.

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Commit messages:
 - Backport cf92693957584e4d4555f8c5f7783feaea2e5c07

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/539/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=539&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8198619
  Stats: 76 lines in 2 files changed: 26 ins; 21 del; 29 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/539.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/539/head:pull/539

PR: https://git.openjdk.java.net/jdk11u-dev/pull/539