Add new OLT ZTE ZXA10 C650

Hi,

I added my OLT ZTE C650 to LibreNMS - but it does not show any information (only uptime).

Discovery: https://p.libren.ms/view/c2a50dbb
Poller: https://p.libren.ms/view/a97d423e
snmpwalk https://p.libren.ms/view/c8eb3575