This change adds get_mac_addresses call to the ManagementInterface which will
be used by both out-of-band inspection and in-band inspection with
ironic-inspector. This will remove the necessity of manually defining MAC
addresses for nodes and/or enabling IPMI functionality on Redfish-based
systems.
Change-Id: I3debcd1f32a2627dafd8456ec73a71fc7c402ebb
Story: 2008038
Task: 40699