Fix setting protocol for heat services in single.yml

This patch makes sure that cluster_public_protocol variable
is used to setting protocol for heat metadata, waitcondition and
watch urls.

Change-Id: I930c64c98d480193dd1561a2a3ca7f03f3181efe
Related-Prod: PROD-21589
Related-Prod: PROD-21611
diff --git a/heat/server/single.yml b/heat/server/single.yml
index e686050..2f28613 100644
--- a/heat/server/single.yml
+++ b/heat/server/single.yml
@@ -15,3 +15,9 @@
         name: heat_domain_admin
         password: ${_param:heat_domain_admin_password}
         domain: heat
+      metadata:
+        protocol: ${_param:cluster_public_protocol}
+      waitcondition:
+        protocol: ${_param:cluster_public_protocol}
+      watch:
+        protocol: ${_param:cluster_public_protocol}
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