Construct end-of-rib (EOR) Update instance.

def create_end_of_rib_update():
    """Construct end-of-rib (EOR) Update instance."""
    mpunreach_attr = BGPPathAttributeMpUnreachNLRI(RF_IPv4_VPN.afi,
                                                   RF_IPv4_VPN.safi,
                                                   [])
    eor = BGPUpdate(path_attributes=[mpunreach_attr])
    return eor