RFR: 7903055: Replace `junit.jar` with `junit-platform-console-standalone` artifact [v4]

[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 five additional commits since the last revision:

 - Merge branch 'openjdk:master' into 7903055-junit5
 - 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/fc40e4c9..def5a14d

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jtreg&pr=63&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jtreg&pr=63&range=02-03

  Stats: 156 lines in 6 files changed: 155 ins; 0 del; 1 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