RFR: 7576: Remove the need for a local jetty server for dependencies [v3]

[Austin Brooks]

> Using newer Tycho features to achieve result:
> 
> Maven dependencies in a target (Tycho 2.2 ): https://github.com/eclipse/tycho/blob/master/RELEASE_NOTES.md#support-for-m2e-pde-maven-target-locations
> Nested target to cut down on duplicate third party code (Tycho 2.6): https://github.com/eclipse/tycho/blob/master/RELEASE_NOTES.md#support-for-nested-targets
> 
> Note: Due to change in 2.7, you must delete a file when switching branches due to changes in the `.m2` folder: https://github.com/eclipse/tycho/blob/master/RELEASE_NOTES.md#caution-when-switching-between-tycho-versions

Austin Brooks has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:

  7576: Remove the need for a local jetty server for dependencies

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Changes: https://git.openjdk.org/jmc/pull/387/files
 Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=387&range=02
  Stats: 584 lines in 10 files changed: 149 ins; 432 del; 3 mod
  Patch: https://git.openjdk.org/jmc/pull/387.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/387/head:pull/387

PR: https://git.openjdk.org/jmc/pull/387