SR-IOV agent can handle ports with same MAC address (located in
different networks). The agent can retrieve, from the system, the
MAC address and the PCI slot; because the PCI slot is unique per
port in the same host, this parameter is used to match with the
Neutron port ID stored in the database (published via RPC).
RPC API bumped to version 1.9.
Closes-Bug: #1791159
Change-Id: Id8c3e0485bebc55c778ecaadaabca1c28ec56205