vdsm-tool: suppoort dependencies between ModuleConfigure

Change-Id: Ibf63ce9aa3ca8edb82091d09b976e8e23896524e
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1127877
Signed-off-by: Mooli Tayer <mtayer@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/31423
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/32050
Reviewed-by: Yaniv Bronhaim <ybronhei@redhat.com>