The [pci]alias configuration option now accepts two new optional fields:
* resource_class: that can be used to request PCI device by placement
RC name.
* traits: a comma separated list of placement trait names that can be
used to filter placement PCI resource provider by traits.
These fields has the matching counterpart in [pci]device_spec
implemented already.
These fields are matched by the Placement GET allocation_candidates
query therefore these fields are ignored when PCI device pools are
matched against IntancePCIRequest by nova.
Note that InstancePCIRequest object spec field is defined as a list of
dicts. But in reality nova creates the request always with a single
dict. So we restricted the placement logic to handle a single spec.
blueprint: pci-device-tracking-in-placement
Change-Id: I5c8f05c3c5d7597175e60b29e4ab2f22e6496ecd
b10482cbc0