[opensuse-buildservice] missing libzypp FileProvides for docker images

Building SLE12 docker images fails if a package to be installed into the images requires an absolute path, instead of an ordinary rpm resolvable. How is this supposed to be fixed in the repo metadata? FileProvides is probably not going to work. In my case zypper does not know that /usr/bin/gconftool-2 comes from gconf2. Olaf