automation: update virt-preview repo URL
automation: update virt-preview repo URL

Change-Id: I260b2a5f8840a8451e4bf1e5e4580a8d7ba7e7e4
Signed-off-by: Sandro Bonazzola <fcb014d63786651910af5db2ecc5316c668188ef@redhat.com>

oVirt/ovirt-hosted-engine-ha,oVirt/ovirt-hosted-engine-ha,oVirt/ovirt-hosted-engine-ha,oVirt/ovirt-hosted-engine-ha