Remove taint from UCP master node

The patch adds ability to remove taint from UCP master node if single_node
(all-in-one) is set to true. However this parameter is set to false by
default.

Related-PRODX: PRODX-9383
Change-Id: If9f5a025415882cd6e4f18b75871619904d47c4b
diff --git a/de/heat-templates/fragments/SrvInstancesVM.yaml b/de/heat-templates/fragments/SrvInstancesVM.yaml
index 6d2bbb9..a9a305d 100644
--- a/de/heat-templates/fragments/SrvInstancesVM.yaml
+++ b/de/heat-templates/fragments/SrvInstancesVM.yaml
@@ -52,6 +52,8 @@
     description: The content of lab metadata.
     default: ''
     type: string
+  single_node:
+    type: string
 
 resources:
 
@@ -76,6 +78,7 @@
             $private_floating_network_cidr: { get_param: private_floating_network_cidr }
             $functions_override: { get_param: functions_override }
             $docker_ucp_image: { get_param: docker_ucp_image }
+            $single_node: { get_param: single_node }
 
   inject_files:
     type: "OS::Heat::CloudConfig"