openvz: Fix code coverage issue in OpenVZ driver
openvz: Fix code coverage issue in OpenVZ driver

After fixing an invalid usage of virDomainNetDef in OpenVZ driver,
a coverage issue appeared. This was caused by a still invalid usage
of net->data.ethernet.dev for non ethernet networking.

shugaoye/libvirt,zippy2/libvirt,elmarco/libvirt,andreabolognani/libvirt,crobinso/libvirt,rlaager/libvirt,fabianfreyer/libvirt,datto/libvirt,crobinso/libvirt,rlaager/libvirt,olafhering/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,olafhering/libvirt,eskultety/libvirt,agx/libvirt,nertpinx/libvirt,zippy2/libvirt,taget/libvirt,shugaoye/libvirt,cbosdo/libvirt,rlaager/libvirt,zhlcindy/libvirt-1.1.4-maintain,nertpinx/libvirt,crobinso/libvirt,eskultety/libvirt,elmarco/libvirt,datto/libvirt,jardasgit/libvirt,zhlcindy/libvirt-1.1.4-maintain,shugaoye/libvirt,datto/libvirt,zhlcindy/libvirt-1.1.4-maintain,nertpinx/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,libvirt/libvirt,taget/libvirt,jardasgit/libvirt,libvirt/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,cbosdo/libvirt,cbosdo/libvirt,crobinso/libvirt,eskultety/libvirt,jardasgit/libvirt,jardasgit/libvirt,shugaoye/libvirt,taget/libvirt,eskultety/libvirt,cbosdo/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,agx/libvirt,jardasgit/libvirt,taget/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,datto/libvirt,elmarco/libvirt,agx/libvirt,libvirt/libvirt,elmarco/libvirt,VenkatDatta/libvirt,shugaoye/libvirt,olafhering/libvirt,cbosdo/libvirt,nertpinx/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,libvirt/libvirt,jfehlig/libvirt,elmarco/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,datto/libvirt,rlaager/libvirt,agx/libvirt,zhlcindy/libvirt-1.1.4-maintain,zhlcindy/libvirt-1.1.4-maintain,zippy2/libvirt,agx/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,taget/libvirt,eskultety/libvirt,rlaager/libvirt,olafhering/libvirt,zippy2/libvirt