clientIF: Check disk alignment using virt-alignment-scan

Change-Id: Ia925f5f138948acca623f6379b7b811474a43ffe
Signed-off-by: Yeela Kaplan <ykaplan@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/12003
Reviewed-by: Federico Simoncelli <fsimonce@redhat.com>