RFR: 7767: Fix handling of version qualifier in core plugins [v3]

[Christoph Langer]

> This PR adds some maven antrun magic to handle the .qualifier version property in core modules

Christoph Langer 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 one additional commit since the last revision:

  JMC-7767

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Changes:
  - all: https://git.openjdk.java.net/jmc/pull/396/files
  - new: https://git.openjdk.java.net/jmc/pull/396/files/f1827ab8..9fcaa7ff

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jmc&pr=396&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jmc&pr=396&range=01-02

  Stats: 11 lines in 10 files changed: 0 ins; 0 del; 11 mod
  Patch: https://git.openjdk.java.net/jmc/pull/396.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/396/head:pull/396

PR: https://git.openjdk.java.net/jmc/pull/396