Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1587905

Description of problem:
When importing a VM from RHEV using APIv4, a NoMethodError appears in log and in WebUI and the action fails.

Version-Release number of selected component (if applicable):
Sat 6.4 snap 6

How reproducible:
Deterministic

Steps to Reproduce:
1. Have a Sat with RHEV CR with 'Use APIv4' checked and some VM in that RHEV
2. Go to CR -> <cr> -> VM tab, in the dropdown menu of some VM, click Import
3. Fill in the rest of the form, click Submit while tailing logs

Actual results:
Traceback, error, fail

Expected results:
VM added successfully

Additional info:
Tested also with APIv3, it does NOT happen with it