trivial: debian: disable test suite if fwupd is currently installed
trivial: debian: disable test suite if fwupd is currently installed

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