[jdk17u-dev] RFR: 8292315: Tests should not rely on specific JAR file names (hotspot)

[Goetz Lindenmaier]

I backport this to enable jtreg 7.

I needed to add an import.

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Commit messages:
 - Backport 62a7fc60d3b3a27525fc01930834dab6f89bd451

Changes: https://git.openjdk.org/jdk17u-dev/pull/1461/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1461&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8292315
  Stats: 10 lines in 1 file changed: 1 ins; 8 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1461.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1461/head:pull/1461

PR: https://git.openjdk.org/jdk17u-dev/pull/1461