Fixes #7401 - Add support for bonds

Renames physical_device to attached_to and move the virtual device
form out of BMC.
Extends the form for Bond devices
Allows configuration of bonds in KS template
Parsing of Bond interfaces from facts
I'm not sure why I don't hit the same issue, I added explicit require_dependency so we know all types before loading Bond, could you please test with latest commit? if it does not help, please specify rails env on which you run the migration and whether there were any other migrations run during same rake task