The metrics-platform project is a mix of multiple languages, including Java. Up to now, the Java build was custom and not relying on our usual template. To ensure coherence and benefit from the same features (SonarQube integration, publication of docs, etc...), we want this project to use the usual templates for building Java projects.
A minimal attempt at configuration is available at https://gerrit.wikimedia.org/r/c/integration/config/+/820396, but it conflicts with the existing configuration.