Switch Neutron build source to downstream

Author: cityofships

etc/kayobe/kolla.yml

@@ -134,6 +134,10 @@ kolla_sources:
     type: git
     location: https://github.com/stackhpc/magnum.git
     reference: stackhpc/{{ openstack_release }}
+  neutron-base:
+    type: git
+    location: https://github.com/stackhpc/neutron.git
+    reference: stackhpc/{{ openstack_release }}
   neutron-base-plugin-networking-generic-switch:
     type: git
     location: https://github.com/stackhpc/networking-generic-switch.git