Adds get_nic_hardware_offload_info method in hostutils, which
will return a list of dictionaries containing details regarding
different NIC hardware offload capacities for SR-IOV, IOV queue
pairs, VMQs, IPsec SAs.
Adds set_vswitch_port_offload method in networkutils, which will
set the given hardware offload options into the given switch port
(enable / disable SR-IOV or VMQ, set IOV queues, set offloaded IPsec
SAs).
Implements: blueprint nic-hardware-offload
Change-Id: Ib2915bd4fe050b97597799f359b310eef7457c58
63ccd40ed9