defining remote_managed PCI device in [pci]passthrough_whitelist with a PCI address glob cause the wrong error

[Balazs Gibizer]

When the [pci]passthrough_whitelist config contains a "remote_managed": True device specification with a PCI address glob that matches a PF nova should reject that as the remote managed feature is only implemented for VFs. Nova does that eventually but with the wrong reason and strange message. Nova tries to use the stringified PciAddressGlobSpec object as a PCI address string when trying to query the PCI product_id of the device. The lookup fails, as PciAddressGlobSpec is not a valid PCI address.

I will push a reproduction test soon.