Set permissive when installing oVirt

There are blocker bugs in oVirt 3.5 which prevents from staring a VM. Quite a
blocker, for a virtual solution :-)

I know this is bad, but we are not testing oVirt here. We are testing rbovirt
integration and Foreman. Set to permissive, the denials are still there, but it
does not block me from running tests and using oVirt.
I'd add a quick comment about why it's set to permissive, ideally with a reference to bugzilla. That way we know that it's because of oVirt, not our things.