[jdk17u-dev] RFR: 8340785: Update description of PassFailJFrame and samples

[Goetz Lindenmaier]

I backport this for parity with 17.0.14-oracle

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Commit messages:
 - Backport 5063494f5b0859a396b4e41096793c777d4650b8

Changes: https://git.openjdk.org/jdk17u-dev/pull/3020/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3020&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340785
  Stats: 159 lines in 1 file changed: 126 ins; 0 del; 33 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3020.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3020/head:pull/3020

PR: https://git.openjdk.org/jdk17u-dev/pull/3020