Adding VTN Networks in mocks config (needed to fake a subscriber)

Change-Id: Ic10e5a65ca6b2f2abafb5876d2a5b7d69cdd03b3
diff --git a/profile_manifests/mock-rcord.yml b/profile_manifests/mock-rcord.yml
index 1c2bcc7..9f7d7b4 100644
--- a/profile_manifests/mock-rcord.yml
+++ b/profile_manifests/mock-rcord.yml
@@ -12,7 +12,7 @@
 
 frontend_only: True
 use_openstack: False
-use_vtn: False
+use_vtn: True
 
 build_xos_base_image: True