Description of problem:
If a SmartState Analysis of a RHV VM is performed, the Operating System full name is populated in the WebUI (for example "CentOS Linux release 7.2.1511 (Core)". This seems to be populated from the vm.operating_system.product_name association/attribute.

If a subsequent provider refresh is performed this is however reset back to the generic Operating System name (for example "rhel_7x64")

Version-Release number of selected component (if applicable):
5.10.0.29

How reproducible:
Every Time

Steps to Reproduce:
1. In the Ops UI view for a RHV VM that hasn't had a SmartState Analysis run, observe the Operating System type. It should be a generic name such as 'rhel_7x64'.
2. Perform a SmartState Analysis of the VM
3. Observe afterwards that the Operating System field for the VM details in the Ops UI now shows the operating system full name
4. Perform a 'Refresh Relationships and Power States' of the same VM

Actual results:
Observe that the Operating System field for the VM details in the Ops UI has been reset back to the generic name

Expected results:
The more detailed operating system name retrieved from SmartState Analysis should still be shown.

Additional info:
Only tested on a RHV provider VM so unknown whether this also affects VMs from other providers.