[Observium] Upgrading to SVN stopped SNMP on my Zhones

Code where this issue crops up appears to be 4711.

4710 looks like it works but 4711 seems to struggle through the poller process. I'm not sure that it isn't the discovery as I have gotten that exact and I'm still on a learning curve here.

That said, 4710 is working right now on my zhones so I'm going keep testing on it.