DNM: Build NGS from custom branch

Author: MoteHue

etc/kayobe/kolla.yml

@@ -146,7 +146,7 @@ kolla_sources:
   neutron-base-plugin-networking-generic-switch:
     type: git
     location: https://github.com/stackhpc/networking-generic-switch.git
-    reference: stackhpc/{{ openstack_release }}
+    reference: nvue-vlan-aware
   neutron-server-plugin-networking-mlnx:
     type: git
     location: https://github.com/stackhpc/networking-mlnx