network: log error when <bandwidth> is requested for hostdev interfaces
network: log error when <bandwidth> is requested for hostdev interfaces

This would previously be silently ignored.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1319044

zippy2/libvirt,fabianfreyer/libvirt,libvirt/libvirt,andreabolognani/libvirt,datto/libvirt,crobinso/libvirt,nertpinx/libvirt,nertpinx/libvirt,zippy2/libvirt,libvirt/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,libvirt/libvirt,zippy2/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,crobinso/libvirt,olafhering/libvirt,taget/libvirt,datto/libvirt,eskultety/libvirt,andreabolognani/libvirt,jardasgit/libvirt,eskultety/libvirt,VenkatDatta/libvirt,crobinso/libvirt,nertpinx/libvirt,taget/libvirt,crobinso/libvirt,olafhering/libvirt,nertpinx/libvirt,nertpinx/libvirt,jardasgit/libvirt,taget/libvirt,olafhering/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,datto/libvirt,jfehlig/libvirt,eskultety/libvirt,taget/libvirt,fabianfreyer/libvirt,eskultety/libvirt,VenkatDatta/libvirt,zippy2/libvirt,fabianfreyer/libvirt,taget/libvirt,datto/libvirt,fabianfreyer/libvirt,libvirt/libvirt,olafhering/libvirt,jfehlig/libvirt,jfehlig/libvirt,jardasgit/libvirt,eskultety/libvirt,datto/libvirt