It appears that scripts for nightly build in Apache Jenkins will stop after unit testing if any unit tests fail. Therefore, contribs, schedulers, and some other system-level automated tests don't ever run until the unit tests are clean. This results in two-phase cleanup of broken builds, which wastes developers' time. Please change them to run even in the presence of unit test errors, as long as the compile+packaging build successfully.
This jira does not relate to CI builds, which emphasize test-patch execution.