Convert javax/swing/border/Test6910490.java applet test to main based test using PassFailJFrame.
------------- Commit messages: - Conversion from Applet to Main Changes: https://git.openjdk.org/jdk/pull/18229/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18229&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8327969 Stats: 61 lines in 2 files changed: 20 ins; 34 del; 7 mod Patch: https://git.openjdk.org/jdk/pull/18229.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/18229/head:pull/18229 PR: https://git.openjdk.org/jdk/pull/18229
