Report qemu-kvm-rhev if installed

Change-Id: If6b59241bbf38b6cd15fd941e1f68115853d22c1
Bug-Url: https://bugzilla.redhat.com/1029792
Signed-off-by: Dan Kenigsberg <danken@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/21226
Reviewed-by: Douglas Schilling Landgraf <dougsland@redhat.com>