vdsm-tool: suppoort dependencies between ModuleConfigure

Change-Id: Ibf63ce9aa3ca8edb82091d09b976e8e23896524e
Signed-off-by: Mooli Tayer <mtayer@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/31423
Reviewed-by: Dan Kenigsberg <danken@redhat.com>