RFR: 8357187: JFR: User-defined defaults should be respected when an incorrect setting is set

[Erik Gahlin]

Could I have a review of PR that fixes user-defined default values for event settings?

Testing: jdk/jdk/jfr

Thanks
Erik

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Commit messages:
 - Remove comments
 - Initial

Changes: https://git.openjdk.org/jdk/pull/25291/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25291&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8357187
  Stats: 82 lines in 6 files changed: 63 ins; 3 del; 16 mod
  Patch: https://git.openjdk.org/jdk/pull/25291.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25291/head:pull/25291

PR: https://git.openjdk.org/jdk/pull/25291