Tested using rhevm-3.5.3-0.2.el6ev, vdsm-4.16.16-1.el7ev.x86_64
Verification instructions:
Reduce the time engine sends OVFs to VDSM to 1 minute by editing vdc_options table in DB (UPDATE vdc_options SET option_value = 1 where option_name = 'OvfUpdateIntervalInMinutes') and restart the ovirt-engine service
1. Create a VM without disks
2. Attach a shared disk to the VM
3. From /rhev/data-center... verify OVF is uploaded to all the domains