<Swing Dev> RFR: 8269951: [macos] Focus not painted in JButton when setBorderPainted(false) is invoked

[Alexander Zuev]

Initial implementation and a test case.

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Commit messages:
 - Test fixes
 - 8269951: [macos] Focus not painted in JButton when setBorderPainted(false) is invoked

Changes: https://git.openjdk.java.net/jdk/pull/5082/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5082&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269951
  Stats: 99 lines in 2 files changed: 99 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5082.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5082/head:pull/5082

PR: https://git.openjdk.java.net/jdk/pull/5082