Add addresses to Machine

[russellb]

We need to populate the addresses field of Machines.

The contents must match what shows up in the associated Node, but the information must come from elsewhere, as it's needed sooner.

This has a dependency on the baremetal-operator completing integration of host introspection. The host introspection data will contain IP and hostname information that we can then copy into the Machine.

[russellb]

This depends on metal3-io/baremetal-operator#147

[russellb]

This was mostly implemented by #24

but a Node will also have the hostname, and we don't have that implemented yet.

There's a related RFE about the hostname here: metal3-io/baremetal-operator#190

[russellb]

@bcrochet Are you working on the hostname part of this, too?

[bcrochet]

@bcrochet Are you working on the hostname part of this, too?

I can. I'll take a look at the rfe.

[bcrochet]

Implemented by metal3-io/baremetal-operator#213 and #91