Silently ignore MAC in NetworkLoadConfig
Silently ignore MAC in NetworkLoadConfig

Libvirt's RPMs have been adding it to networks which don't support it.

https://bugzilla.redhat.com/show_bug.cgi?id=1156367

taget/libvirt,shugaoye/libvirt,agx/libvirt,eskultety/libvirt,zippy2/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,crobinso/libvirt,fabianfreyer/libvirt,olafhering/libvirt,agx/libvirt,andreabolognani/libvirt,libvirt/libvirt,jfehlig/libvirt,zippy2/libvirt,nertpinx/libvirt,eskultety/libvirt,taget/libvirt,taget/libvirt,VenkatDatta/libvirt,agx/libvirt,elmarco/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,zippy2/libvirt,rlaager/libvirt,elmarco/libvirt,rlaager/libvirt,taget/libvirt,fabianfreyer/libvirt,eskultety/libvirt,libvirt/libvirt,nertpinx/libvirt,libvirt/libvirt,fabianfreyer/libvirt,olafhering/libvirt,jardasgit/libvirt,jardasgit/libvirt,taget/libvirt,jardasgit/libvirt,shugaoye/libvirt,shugaoye/libvirt,agx/libvirt,andreabolognani/libvirt,zippy2/libvirt,elmarco/libvirt,nertpinx/libvirt,crobinso/libvirt,eskultety/libvirt,shugaoye/libvirt,agx/libvirt,jfehlig/libvirt,libvirt/libvirt,andreabolognani/libvirt,crobinso/libvirt,elmarco/libvirt,nertpinx/libvirt,datto/libvirt,jfehlig/libvirt,rlaager/libvirt,jardasgit/libvirt,andreabolognani/libvirt,olafhering/libvirt,crobinso/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,eskultety/libvirt,olafhering/libvirt,datto/libvirt,datto/libvirt,shugaoye/libvirt,rlaager/libvirt,datto/libvirt,rlaager/libvirt,VenkatDatta/libvirt,datto/libvirt,jardasgit/libvirt,andreabolognani/libvirt,elmarco/libvirt