AETHER-3110 Add support of policy based tunnel

Change-Id: Ic430930883b6f23edf08fcb945e8c99676f5ffba
diff --git a/playbooks/vpn-playbook.yml b/playbooks/vpn-playbook.yml
index 5ccc942..b6da7cd 100644
--- a/playbooks/vpn-playbook.yml
+++ b/playbooks/vpn-playbook.yml
@@ -5,5 +5,5 @@
   hosts: vpn
   become: true
   roles:
-    - bird
-    - strongswan
+    - {role: bird, when: "strongswan_conf_install_routes == false"}
+    - {role: strongswan}