Placement v1 Resources

• openstack.placement.v1.allocation
• openstack.placement.v1.allocation_candidate
• openstack.placement.v1.resource_class
• openstack.placement.v1.resource_provider
• openstack.placement.v1.resource_provider_allocation
• openstack.placement.v1.resource_provider_inventory
• openstack.placement.v1.resource_provider_trait
• openstack.placement.v1.trait
• openstack.placement.v1.usage