Also, talking to the Core OVN developers. They advised me to always have this enabled, it shouldn't be a problem and if mcast_snoop is disabled on the LS the "mcast_flood_reports" from LSPs will just be ignored and not cause any harm.
So the patch for the OVN driver in Neutron shouldn't be complicated. I will try to upload a fix soon.
Also, talking to the Core OVN developers. They advised me to always have this enabled, it shouldn't be a problem and if mcast_snoop is disabled on the LS the "mcast_ flood_reports" from LSPs will just be ignored and not cause any harm.
So the patch for the OVN driver in Neutron shouldn't be complicated. I will try to upload a fix soon.