RFR: 8327969: Convert javax/swing/border/Test6910490.java applet test to main [v2]

[Tejesh R]

> Convert javax/swing/border/Test6910490.java applet test to main based test using PassFailJFrame.

Tejesh R has updated the pull request incrementally with one additional commit since the last revision:

  Review updates

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18229/files
  - new: https://git.openjdk.org/jdk/pull/18229/files/8e4729c3..d8f01e22

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18229&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18229&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 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