Add pillars with default policy configuration for OS services

PROD-34318

Change-Id: I46dee301c78450b2aa7a6430de1f3432756688d8
diff --git a/horizon/server/plugin/neutron_bgpvpn.yml b/horizon/server/plugin/neutron_bgpvpn.yml
index 7ad75ff..69dd4be 100644
--- a/horizon/server/plugin/neutron_bgpvpn.yml
+++ b/horizon/server/plugin/neutron_bgpvpn.yml
@@ -1,3 +1,5 @@
+classes:
+- system.defaults.openstack.policy.all
 parameters:
   horizon:
     server:
@@ -6,3 +8,8 @@
           source:
             engine: pkg
             name: python-networking-bgpvpn
+      policy:
+        bgpvpn:
+          enabled: true
+          source: pillar
+          pillar: ${_param:bgpvpn_default_policy_${_param:openstack_version}}