Update altai-installer and nova

altai-installer-1.1.3:
    - Set fixed_range to empty string by default
    - Set resize options (Issue: altai-150)
nova-2012.1.2:
    - Make it possible to disable fixed_range-related iptables rules (Issue: altai-90)
    - Add force_resize_to_same_host option (Issue: altai-150)

Change-Id: Ifc8323b90961203dad5e3e4ed4d2367c4907e7a6