Add support for Tripplite PDU PDUMV20NETLX

Discovery: https://p.libren.ms/view/f3f3907c
Poller: https://p.libren.ms/view/c77ca526
SNMP Walk: https://p.libren.ms/view/66a1b8d0

I’ve added the device successfully via SNMP and can see network traffic, but no metrics for power are available. I do see Tripplite provides an MIB on their website. Anyone able to please help me add better support for this device? Thanks!

(Imported from https://github.com/librenms/librenms/issues/10531, Original request by: @vb543)

Sorry to bump this old thread of mine, but I was looking to try to get this working again. I tried to create my own definitions yaml file and upload the tripp lite MIBs to the mib directory - but I think I’m in over my head and there was no change to the discovery.

Any suggestions / assistance would be greatly appreciated!