[jdk11u-dev] RFR: 8233555: [TESTBUG] JRadioButton tests failing on MacoS

[Martin Doerr]

Backport of JDK-8233555. Enables 3 tests by removing them from ProblemList.

-------------

Commit messages:
 - Backport 227f99d394571331ffa40b0b6b9d9d61c90635dd

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/549/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=549&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8233555
  Stats: 3 lines in 1 file changed: 0 ins; 3 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/549.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/549/head:pull/549

PR: https://git.openjdk.java.net/jdk11u-dev/pull/549