RFR: 7767: Fix handling of version qualifier in core plugins [v4]

[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 pull request now contains one commit:

  JMC-7767

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Changes: https://git.openjdk.java.net/jmc/pull/396/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=396&range=03
  Stats: 59 lines in 1 file changed: 58 ins; 0 del; 1 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