Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1191953
Description of problem:
I can create alias and bond interfaces without specifying identifier. I think its required to link the virtual interface with the physical one.

If we don't pass identifier then I think it won't be configured on provisioned host via config template.

Version-Release number of selected component (if applicable):
Satellite-6.1.0-RHEL-6-20150210.0
Sat6.1.0 beta snap2

How reproducible:
always

Steps to Reproduce:
1. Add_interface of type Bond and alias
2.
3.

Actual results:
Alias and bond Interfaces can be created without interface identifier

Expected results:
User should get validation error as identifier are required for linking purpose.

Additional info: