I noticed the `swh-environment` jenkins job running the whole set of tests on the
dev version of swh modules was in bad shape since a while (see [[ https://jenkins.softwareheritage.org/view/all/job/swh-environment/2706/console | this log ]] for instance).
So I took some time to fix it as it can be usefull to detect breaking changes
across swh modules.
The job was also missing a `jenkins-job-builder` definition file so the creation
of that diff.
The job will be aborted when one test suite fails to quickly detect flaky tests
and API breakage.
You can see in [[ https://jenkins.softwareheritage.org/view/all/job/swh-environment/2735/console | that log ]] that swh module test suites
are now correctly executed sequentially.