RFR: 8292315: Tests should not rely on specific JAR file names (hotspot)

[Christian Stein]

These changes improve test stability by removing a hard-coded dependency on a JAR file name.

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Commit messages:
 - 8292315: Tests should not rely on specific JAR file names (hotspot)

Changes: https://git.openjdk.org/jdk/pull/9916/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9916&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8292315
  Stats: 9 lines in 1 file changed: 0 ins; 8 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/9916.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9916/head:pull/9916

PR: https://git.openjdk.org/jdk/pull/9916