Allow for_hardware scripts to use any system information collected during commissioning.

[Lee Trager]

MAAS has the ability to only run commissioning or testing scripts on hardware identified by the script. MAAS will match modaliases, pci ids, usb ids, system_{vendor,product,version}, or mainboard_{vendor,product}. LXD is now collecting alot more system information such as SKU and serial. MAAS should be able to match on any system information identified by LXD.