Description of problem:
Create a vm from catalog and then check the vm nic model on the nic tab, it's empty. Editing the nic, the default value is "virtio".

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. create vm from catalog
2. go to customize
3. review the nic tab, the model is empty
4. create the vm and review the vm nic tab, the model is empty
5. edit the nic, the model is "virtio"

Actual results:
vm nic model is empty

Expected results:
vm nic model is "virtio"

Additional info: