[jdk17u-dev] RFR: 8239502: [TEST_BUG] Test javax/swing/text/FlowView/6318524/bug6318524.java never fails

[Goetz Lindenmaier]

I backport this for parity with 17.0.3-oracle.

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Commit messages:
 - Backport b7425b63f6b69ba8709664377b4e037176ab6139

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/45/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=45&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8239502
  Stats: 194 lines in 1 file changed: 194 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/45.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/45/head:pull/45

PR: https://git.openjdk.java.net/jdk17u-dev/pull/45