RFR: 8317188: G1: Make TestG1ConcRefinementThreads use createTestJvm

[Leo Korinth]

On Thu, 28 Sep 2023 08:34:31 GMT, Leo Korinth <lkorinth at openjdk.org> wrote:

> Testing after changes:
> 
> `make run-test TEST=open/test/hotspot/jtreg/gc/arguments/TestG1ConcRefinementThreads.java JTREG='JAVA_OPTIONS=-XX:+UseG1GC' ` -> PASS 1
> `make run-test TEST=open/test/hotspot/jtreg/gc/arguments/TestG1ConcRefinementThreads.java JTREG='JAVA_OPTIONS=-XX:+UseZGC' ` -> TOTAL 0
> `make run-test TEST=open/test/hotspot/jtreg/gc/arguments/TestG1ConcRefinementThreads.java JTREG='JAVA_OPTIONS=-XX:G1ConcRefinementThreads=42' ` -> TOTAL 0

Thanks Hamlin and Thomas!

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PR Comment: https://git.openjdk.org/jdk/pull/15958#issuecomment-1766265551