WIP migrate host nics to nics table

Conflicts:
	app/models/nic/base.rb
	test/unit/architecture_test.rb
Primary interface validations

Fixing nic_test.rb
Add provisioning interface
Fix migration
Fix some dhcp tests
TFTP WIP
Fix all DHCP tests
Fix migration to access host attributes directly, since methods are delegated to the primary_nic
Fixing DNS tests and few others
Fix host counter in doman
Require provision interface and delegate TFTP
Set provision flag + fix related tests
WIP test fixes

Conflicts:
	app/models/host/managed.rb
Few host tests fixed
Subnet fixes
Missed rebase fixes
Fix ip sequence on Nic::Managed factory and restructure ParameterTest
Make dhcp/dns traits of subnet factory, to avoid orchestration happening by default
Add :ip and :mac options back to Host factory
Ovirt test fixes