RFR: 8083: Updates for releng projects

[Christoph Langer]

On Fri, 9 Jun 2023 21:23:43 GMT, Christoph Langer <clanger at openjdk.org> wrote:

> The releng projects (Local update site for building/development and Eclipse platform definition files) need some TLC.
> 
> The releng/third-party project needs some version bumps. Furthermore, for importing it as maven project into eclipse, it should have a .classpath file.
> 
> In detail, I bumped versions of the used plugins. Most significantly I updated the used jetty-maven-plugin from 9.4.46.v20220331 to 11.0.15. Seems to work out of the box, no issues. The config parameter `scanIntervalSeconds` is not recognized in that version any more.
> Furthermore, I changed the maven enforcer settings to require JDK 17 and Maven 3.5.0, as in other places.
> 
> Also, the Eclipse platform URL should use https rather than http nowadays. Spolier/Outlook: To be able to use Eclipse 2023-06 I believe that we will need to find a solution to run the jetty with https. Otherwise, importing into Eclipse will not work any longer.

Thanks for the review.

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PR Comment: https://git.openjdk.org/jmc/pull/494#issuecomment-1586327663