Description of problem:
When creating a vm with virtIO drivers for disk, vm starts with the ide driver

Version-Release number of selected component (if applicable):
latest ovirt engine source

How reproducible:
create a disk vm through the webadmin interface with virtio drivers.

Steps to Reproduce:
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Actual results:
when starting the vm, virtio appear to be used in the webadmin interface as expected. When doing virsh edit vm on the node, ide drivers are used instead of virtio as expected.

Expected results:
<bus=virtio>

Additional info:
On the linux vm, vda must appear instead of hda