[jdk17u-dev] RFR: 8315606: Open source few swing text/html tests

[Goetz Lindenmaier]

I backport this for parity with 17.0.10-oracle.

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Commit messages:
 - Backport 4127fbb9ed6ca3c3e82da599dbf9cee54de5da31

Changes: https://git.openjdk.org/jdk17u-dev/pull/1845/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1845&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315606
  Stats: 398 lines in 4 files changed: 398 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1845.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1845/head:pull/1845

PR: https://git.openjdk.org/jdk17u-dev/pull/1845