LicenseDict gets withholds: NotRequired[List[str]]: what a device keeps back
for want of a license while the rest of it answers. A Supermicro X10 with
only SFT-OOB-LIC answers Redfish but withholds its drives and firmware
inventory until DCMS is activated. That makes it partly licensed, not
unlicensed, and the caller can tell the two apart (NetOrk/netork#1111).