Comment 32 for bug 1918145

I've come up with a patch for Ussuri that seems to work in all cases.

I'm still doing regression testing of this patch from both a performance and correctness perspective, but it seems to work on both accounts so far.

Comparing changes with the patch to upstream in my development build:
osc network list: 0m21.095s -> 0m2.608s
osc network show <name>: 0m19.178s -> 0m2.953s
osc port create --network <name>: 0m35.204s -> 0m5.635s
osc port delete <uuid>: 0m11.437s -> 0m3.863s