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
Allow configuration of bonds in KS template
Parsing of Bond interfaces from facts
Mac address is required only for physical devices
Fixes #5139 - leftovers subscribe_to_all_hostgroups

Remove user_xxx unnecessary tables and notices

Update subhostgroups removed

Fixes for migration of foreign keys

Remove users from compute_resource fixture

Remove table notices after fk are removed for pg/mysql