Handle IPSec network encryption

Whether to enable IPSec network encryption using
SecureOverlay in Kubernetes

Related-Bug: PRODX-21133
Change-Id: I904da6190bd337de0b2f9e04e93848696da83f9d
diff --git a/de/heat-templates/fragments/SrvInstancesVM.yaml b/de/heat-templates/fragments/SrvInstancesVM.yaml
index 93372b0..d3e0427 100644
--- a/de/heat-templates/fragments/SrvInstancesVM.yaml
+++ b/de/heat-templates/fragments/SrvInstancesVM.yaml
@@ -73,6 +73,8 @@
   availability_zone:
     type: string
     default: nova
+  secure_overlay_enabled:
+    type: boolean
 
 resources:
 
@@ -100,6 +102,7 @@
             $docker_ucp_swarm_data_port: { get_param: docker_ucp_swarm_data_port }
             $docker_default_address_pool: { get_param: docker_default_address_pool }
             $single_node: { get_param: single_node }
+            $secure_overlay_enabled: { get_param: secure_overlay_enabled }
 
   inject_files:
     type: "OS::Heat::CloudConfig"