trivial: installed-tests: try to display journal for failed tests
trivial: installed-tests: try to display journal for failed tests

This should help make debugging from CI infrastructures such as
autopkgtest easier.

fwupd/fwupd,fwupd/fwupd,hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd