Ensure Nova Network-compatible demo provisioning

Due to a limitation in the implementation of openstack::provision,
demo provisioning was previously limited to deployments with
Neutron.  This change adds support for provisioning users and
images and configuring tempest for deployments using Nova Network.

Conflicts:
	packstack/installer/run_setup.py
	packstack/plugins/provision_700.py
	packstack/puppet/modules/openstack

Cherry-picked from d3bb52e0a2489a23d41411550d056f533f5f0a2f in master.

Change-Id: Ic5d35e1f0f4f1fb8815193a7573955952dd698e4