The Ironic codebase is pretty simple for database access. This work
leads into the introduction of versioned object technology from nova
and ironic that will be entering oslo:
https://review.openstack.org/#/c/127532/
This will drastically speed up the process of implementing moving the
RPC objects across the network.
Change-Id: I38aa451b658b66f5b6f10ced03ea2e0355af4ecd