If this is for you a peliminer test and you ought to eventually reinstall, you can also give a try to 3.5.1 and so go with centos7. You can find links here:
http://www.ovirt.org/OVirt_3.5.1_Release_Notes
http://www.ovirt.org/Testing/oVirt_3.5.1_Testing
I don't remember the link with the list of still opened and / or blocking bugs
HIH, Gianluca