Support Java 11 and newer Jenkins versions

[tdraebing]

Lucene search did not support new Jenkins versions, since the Lucene version did not support Java 11.

This change update Lucene to 8.11.2, thereby supporting Java 11. It also bumps the Jenkins version to 2.361.4.

BREAKING CHANGE: Existing users will have to delete the existing index and rebuild it, since the update from Lucene 3 to 8 does not provide an upgrade path.

This change also removed the solr-dependency. Since Solr did not support Jetty 10 (will be added with the next release), it would not be supported by newer Jenkins version. Solr-support was anyway not included in the existing releases.

• [x] Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• [x] Ensure that the pull request title represents the desired changelog entry
• [x] Please describe what you did
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• [x] Link to relevant pull requests, esp. upstream and downstream changes
• [x] Ensure you have provided tests - that demonstrates feature works or fixes the issue

[tdraebing]

@NotMyFault @hmarkc Do you have any idea why the Jenkins Ci still uses Java 8 and not Java 11 to build this PR?

[NotMyFault]

NotMyFault hmarkc Do you have any idea why the Jenkins Ci still uses Java 8 and not Java 11 to build this PR?

ci.jenkins.io does not accept Jenkinsfile modifications from contributors, who aren't repository admins, for security reasons. Therefore, your PR will use the Jenkinsfile revision located in the repository, over the changes proposed.

[tdraebing]

Thanks for the explanation! @hmarkc Could you do the Jenkinsfile change, if you agree with this PR here?

[MarkEWaite]

I used my ci.jenkins.io admin privileges to run the Jenkinsfile included in this PR. Works great. Thanks for adopting the plugin!