RFR: 7903055: Replace `junit.jar` with `junit-platform-console-standalone` artifact [v3]

[Christian Stein]

> https://bugs.openjdk.java.net/browse/CODETOOLS-7903055

Christian Stein has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - Merge branch 'openjdk:master' into 7903055-junit5
 - Retain full base name of the JAR file
 - Restore updated comment
 - Replace `junit.jar` with `junit-platform-console-standalone` artifact
   
   https://bugs.openjdk.java.net/browse/CODETOOLS-7903055

-------------

Changes:
  - all: https://git.openjdk.java.net/jtreg/pull/63/files
  - new: https://git.openjdk.java.net/jtreg/pull/63/files/93a391a5..fc40e4c9

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jtreg&pr=63&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jtreg&pr=63&range=01-02

  Stats: 37 lines in 12 files changed: 5 ins; 9 del; 23 mod
  Patch: https://git.openjdk.java.net/jtreg/pull/63.diff
  Fetch: git fetch https://git.openjdk.java.net/jtreg pull/63/head:pull/63

PR: https://git.openjdk.java.net/jtreg/pull/63