Tweak use of OvirtResourceRestCall for !PUT requests
Tweak use of OvirtResourceRestCall for !PUT requests

It's more appropriate to use this when doing a GET on a resource or
collection rather than using OvirtActionRestCall. However, unless we are
doing a PUT, we don't need to send a serialized version of the object we
are handling.

etrunko/libgovirt,GNOME/libgovirt,etrunko/libgovirt