Error using codegenerator with java 11

[gg-dim]

This looks like a packaging problem of the generator. org.eclipse.core.* jars are on java17 compliance level. So maybe we should take an older version here.

* What went wrong:
Execution failed for task ':de.jena.udp.trafficos.intersectionsystem.model:generate'.
> org/eclipse/core/resources/IContainer has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 55.0