Comment 23 for bug 2024160

There we go, I tracked it down to this commit:

https://github.com/ovn-org/ovn/commit/28d40c0a024227c9c845117087b7594723ff0ec7

The reality is that we 'fixed' Neutron by accommodating for this:

https://github.com/ovn-org/ovn/commit/ec933537f9b04b35ef4b79fb2b4743f9095da209

But we didn't notice we might be getting deletes for trunk ports (parent_port aka container). We need to accomodate for this.