Dlux - BGP models not listed after installation of odl-bgpcep-bgp-all feature

Bug reported by Jan Medved:
We seem to have some quite serious problems with DLUX in Boron, and with YangUI in both Boron and Beryllium. I downloaded the latest Boron distro, and when I started YangUI the models were not even loaded from the controller. In Beryllium, YangUI only seems to be loading a small set of models. In any case, after installing the old-bgpcep-bgp-all, I do not see the top level BGP models at all (I should be seeing the openconfig model).