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A new pair of Jenkins jobs need to be created, to cover building the unstable launchpad and running the integration tests against it. The launchpad should be deployed with a different classifier, to prevent any mix-ups on repository.apache.org.
Related concepts
Maven 3.5.0 has introduced a concept of CI-friendly-versions ( see more information at https://maven.apache.org/maven-ci-friendly.html ), but it's not clear if we can benefit from this feature.