OperDS entry for internal VPN (neutron router) still contains deleted neutron ports

fib-show shows fib-entries for these ports

steps:

1. create 2 neutron-nets
2. create 2 subnets IPv4+IPv6 in each net
3. create router
4. add all subnets as ports to this router
5. create AllowAll security group
6. create 2 neutron ports in each NET with AllowAll security-group
7. fib-show && vpn-show --detail d84d3b83-1eee-44dc-ba33-3bbf45328716
8. vpninstance-op-show --detail
9. vpnservice:neutron-ports-show 
10. neutron port-delete ....delete one port from each NET
11. fib-show && vpn-show --detail d84d3b83-1eee-44dc-ba33-3bbf45328716
12. vpninstance-op-show --detail
13. vpnservice:neutron-ports-show 

We can see, that neutron-port-show output was updated, but OperDS entry for VPN instance still not