The default timeout is too short for some overburdened or resource
constrained machines to complete the WMI query before the context
deadline expires. This causes them to be unable to fingerprint the CPU
properly.
The new version of gopsutil introduces a 3 second timeout that could come up as an error here; however, we are outputting the wrong variable and eating the error.
This PR:
* Uses Go 1.8 executable lookup
* Stores any err message from stats init method
* Allows overriding of Cpu Compute for hosts where it can't be detected
