update_subscription_facet_backend_data fails with virt-who host with hostname ending in period '.'
Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1367944
Description of problem:
When upgrading to 6.2, the upgrade will fail/error if any of your virt-who hosts have a name that ends in a period.
This is made more common by the fact that virt-who will upload 'hostname.' if domain is blank
Version-Release number of selected component (if applicable):