Use Neutron fork

Author: mnasiadka

etc/kayobe/kolla.yml

@@ -139,6 +139,10 @@ kolla_sources:
     type: git
     location: https://github.com/stackhpc/keystone.git
     reference: stackhpc/{{ openstack_release }}
+  neutron-base:
+    type: git
+    location: https://github.com/stackhpc/neutron.git
+    reference: 2025.1-ovn-chassis2
   neutron-server-plugin-networking-mlnx:
     type: git
     location: https://github.com/stackhpc/networking-mlnx.git