Add external interface on proxy node for Queens labs

Modified labs:
- cookied-cicd-queens-dvr-sl
- cookied-mcp-queens-dvr-ceph
- cookied-mcp-queens-dvr-ssl-barbican
- cookied-mcp-queens-dvr-ssl
- cookied-mcp-queens-dvr
- cookied-mcp-queens-ovs

Change-Id: Ibe0624c6b75624a4565a20dfaad4f628a14d6c1f
Related-Bug: PROD-22111
diff --git a/tcp_tests/templates/cookied-mcp-queens-dvr-ssl-barbican/_context-environment.yaml b/tcp_tests/templates/cookied-mcp-queens-dvr-ssl-barbican/_context-environment.yaml
index 7102e9c..22d74ad 100644
--- a/tcp_tests/templates/cookied-mcp-queens-dvr-ssl-barbican/_context-environment.yaml
+++ b/tcp_tests/templates/cookied-mcp-queens-dvr-ssl-barbican/_context-environment.yaml
@@ -91,13 +91,17 @@
     prx01.mcp-queens-dvr-ssl.local:
       reclass_storage_name: openstack_proxy_node01
       roles:
-      - openstack_proxy
+      #- openstack_proxy  # another VIP interface used
       - linux_system_codename_xenial
       interfaces:
         ens3:
           role: single_dhcp
         ens4:
           role: single_ctl
+        ens5:
+          role: single_external
+          external_address: 172.17.16.121
+          external_network_netmask: 255.255.255.0
 
     # Generator-based computes. For compatibility only
     cmp<<count>>.mcp-queens-dvr-ssl.local: