RFR: 8286460: Remove dependence on JAR filename in CDS tests [v2]

[Christian Stein]

> Use location information stored in JUnit `Test` class' runtime representation in order to remove a hard-coded dependence on JUnit's JAR filename.

Christian Stein has updated the pull request incrementally with one additional commit since the last revision:

  Update copyright year to 2022

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8624/files
  - new: https://git.openjdk.java.net/jdk/pull/8624/files/d7c6d756..5ebd8c03

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8624&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8624&range=00-01

  Stats: 14 lines in 14 files changed: 0 ins; 0 del; 14 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8624.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8624/head:pull/8624

PR: https://git.openjdk.java.net/jdk/pull/8624