Summary: Expanded ButtonGroupLayoutTraversalTest.java to run in all LAFs on all OS. Added synchronization for focusCnt.
------------- Commit messages: - 8270116: Expand ButtonGroupLayoutTraversalTest.java to run in all LaFs, including Aqua on macOS Changes: https://git.openjdk.java.net/jdk/pull/4937/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4937&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8270116 Stats: 112 lines in 1 file changed: 44 ins; 28 del; 40 mod Patch: https://git.openjdk.java.net/jdk/pull/4937.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/4937/head:pull/4937 PR: https://git.openjdk.java.net/jdk/pull/4937
