Do not list neutron in requirements.txt

It does not play nicely with openstack/requirements

Change-Id: I9ac3c2bacdde7be45aa8c9f76e2a6d86508608d2
Partially-Implements: blueprint services-split
Fixing HEAD file to have correct migration

Change-Id: I9a38a3eee82314bdbed94089798d51794fa96e60
Merge "Fixing HEAD file to have correct migration"