Add insecure option to heat's heat client

When using ssl with self signed cert, wait condition should
be sent with insecure option. As cert is not trusted on instance
side.

Update virtual-offline-ssl model

Change-Id: I40160dfecf067fc71d8bd02249dc097036998982
Related-Prod: PROD-19827
diff --git a/classes/cluster/virtual-offline-ssl/openstack/control.yml b/classes/cluster/virtual-offline-ssl/openstack/control.yml
index f2bddcc..c085eab 100644
--- a/classes/cluster/virtual-offline-ssl/openstack/control.yml
+++ b/classes/cluster/virtual-offline-ssl/openstack/control.yml
@@ -223,6 +223,11 @@
           address: 127.0.0.1
       identity:
         protocol: https
+      # Since we using self signed cert not present in images, we have to
+      # use insecure option when sending signal to wait condition from instance.
+      clients:
+        heat:
+          insecure: true
   neutron:
     server:
       bind: