Created attachment 1292470 [details]
Description of problem:
When I set CFME Server Relationship for any Infra VM and try to save it, CFME remains on the save page and raises exception.
I didn't manage to reproduce this issue with cloud instances.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Add any Infra Provider
2. Find any vm and open Details page for it
3. Choose Configuration->Edit Management Engine Relationship
4. Choose server and click Save
Nothing happens in UI
production.log contains exception
*** This bug has been marked as a duplicate of bug 1429962 ***