Add DesktopCentral arbitrary file upload exploit.
Module cleaned for msftidy compliance.
Update References field to be compliant.
Fix stdout/stderr check to avoid ruby payloads

[SeeRM #8498]

This knocks out all the non-datastore editing ERROR messages, so we've
got that going for us. Which is nice.
Write a nonstupid regex (2-pass test)
Remove capturing parens and debug hexes.
Clean indentation
Fix use of FileDropper and improve check method
improve upload_file response check
Fix metadata
Fix target name
Delete empty Payload metadata section
Add Privileged flag
Land #2650, @pnegry's exploit for DesktopCentral 8
Land #2669, msftidy Ruby payload std{out,err} fix