Make neutron vpnaas dashboard configurable

Depends-On: Ia3faa5b52f9321349e57902b5b1d90068d388cc0

Change-Id: I6442121d3e0a33f922939b94c8b0c483ae8141a4

etc/kolla/globals.yml

@@ -184,6 +184,7 @@ kolla_internal_vip_address: "10.10.10.254"
 #enable_horizon_mistral: "{{ enable_mistral | bool }}"
 #enable_horizon_murano: "{{ enable_murano | bool }}"
 #enable_horizon_neutron_lbaas: "{{ enable_neutron_lbaas | bool }}"
+#enable_horizon_neutron_vpnaas: "{{ enable_neutron_vpnaas | bool }}"
 #enable_horizon_octavia: "{{ enable_octavia | bool }}"
 #enable_horizon_sahara: "{{ enable_sahara | bool }}"
 #enable_horizon_searchlight: "{{ enable_searchlight | bool }}"