Change-Id: I0d66e49f09313de8abb89f510c7a5098507c572a
Nova allows customisation of various metadata passed through to VMs via a 'release' file[0]. Allow operators to make use of this. [0] https://github.com/openstack/nova/blob/master/etc/nova/release.sample Change-Id: I71569314c8e64320f8ffad79b9273f4d6d903bb6