This adds two config options that we need in order to successfully build
our Rackspace images.
First, a boolean `rackconnect_wait` option which waits for the
RackConnect metadata to appear.
Second, an `ssh_interface` option, for rackconnect users who have more
prohibitive firewalls on the 'public' interface and want to ensure all
traffic to the server goes over the 'private' one.
Finishes #952.
Add configuration option `networks`, a list of network UUIDs, to attach to the
source instance.
In some openstack installs, no default network will be attached or the network
with the ability to attach a public floating IP will need to be specified.
This change adds base support for an openstack builder.
Thank you to Rackspace for providing cloud assets to complete this work
and @sam-falvo for working with us on the perigee/gophercloud changes.
