[jdk21u-dev] RFR: 8303525: Refactor/cleanup open/test/jdk/javax/rmi/ssl/SSLSocketParametersTest.java

[Goetz Lindenmaier]

I backport this for parity with 21.0.4-oracle.

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Commit messages:
 - Backport 704c6ea16cabc217588f430fd3c302d6df5e9c19

Changes: https://git.openjdk.org/jdk21u-dev/pull/323/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=323&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303525
  Stats: 174 lines in 2 files changed: 59 ins; 93 del; 22 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/323.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/323/head:pull/323

PR: https://git.openjdk.org/jdk21u-dev/pull/323