Extreme FabricEdge Devices is discovered as "Extremeware" -> Needs to be FabricEdge (VOSS-like)

Hi,

a extreme networks universal hardware 5420M is discovered as "Extremeware". But this device is running VOSS - the so called FabricEdge mode.

Because of this, some things are missing in observium overview (like FDB usage) - the device can be discovered and polled as "VOSS" devices.