Comment 3 for bug 1842988

And for completeness, here's the output of `ovn-nbctl lr-nat-list` after rebooting that server:
~~~
(overcloud) [stack@undercloud-0 ~]$ nova reboot rhel-test3
Request to reboot server <Server: rhel-test3> has been accepted.
(overcloud) [stack@undercloud-0 ~]$
~~~

~~~
[root@overcloud-controller-0 ~]# ovn-nbctl lr-nat-list neutron-e75c5fb4-29ee-450d-840f-a911c9896256
TYPE EXTERNAL_IP LOGICAL_IP EXTERNAL_MAC LOGICAL_PORT
dnat_and_snat 172.31.0.201 192.168.0.101 fa:16:3e:ee:4b:3b b7e9fb53-db4e-4b3e-a6e4-2acbbc4ba9ba
dnat_and_snat 172.31.0.210 192.168.1.101 fa:16:3e:9e:96:da 79f8f865-30c7-48ab-9017-76ce6c007c1b
dnat_and_snat 172.31.0.217 192.168.0.103 fa:16:3e:8b:04:4f 581de757-7b2e-4995-aa84-3c4bc58edd4d
snat 172.31.0.212 192.168.10.0/24
snat 172.31.0.212 192.168.0.0/24
snat 172.31.0.212 192.168.1.0/24
~~~