Move boot-stack initialisation out of first-boot.

This permits the heat data to be updated by heat-localip, run by
os-refresh-config, before the keystone registration runs within
wipe-openstack. This is needed to generate correct registrations
for the undercloud control plane.

Change-Id: If686b56a3cc5fc45bbb40c4ec56a202576fa9b69
Rename quantum->neutron for the client.

Just another step in dealing with the ongoing Quantum -> Neutron
renaming.

Change-Id: I214a11be32a8c06b75456087773042ceb9b527c8