Revive Chutney functional tests
We used to have a nice suite of v2 and v3 Chutney tests but those broke when Chutney got updated. We should fix the Chutney scripts to work again and revive those tests (and maybe write some more).
Relevant commit: 89041780
(Moved from https://github.com/asn-d6/onionbalance/issues/46)