Comment 2 for bug 1857448

Triaging this as medium as this is a silent failure that would allow limts on vms per host to be exceeded that would not be obvious unless the operator specifically looked for it. that said this could also be considered low for many deployments as the NumInstanceFilter is not enabled by default
https://github.com/openstack/nova/blob/65aae518f81c2754e30429a3547c5cf62a3cf598/nova/conf/scheduler.py#L320-L334