Invalidate the sack when succesfully calling hif_context_run()
Invalidate the sack when succesfully calling hif_context_run()

If we remove or install packages then the @system sack is no longer valid.

kalev/libhif,cgwalters/libhif,rpm-software-management/libhif,rpm-software-management/libhif,cgwalters/libhif,kalev/libhif,edynox/libdnf,hughsie/libhif,cgwalters/libhif,Conan-Kudo/libhif,edynox/libdnf,rpm-software-management/libdnf,hughsie/libhif,edynox/libdnf,Conan-Kudo/libhif,hughsie/libhif,edynox/libdnf,hughsie/libhif,juhp/libhif,rpm-software-management/libdnf,rpm-software-management/libhif,rpm-software-management/libdnf,cgwalters/libhif,rpm-software-management/libdnf,rpm-software-management/libhif,Conan-Kudo/libhif,juhp/libhif,Conan-Kudo/libhif