Pre-cache images when using TP ucp image

Related-Prod: PRODX-7035
Change-Id: I8f682efd4c39156f6db4b6299f3a48663da26423
diff --git a/de/heat-templates/fragments/SrvInstancesBM.yaml b/de/heat-templates/fragments/SrvInstancesBM.yaml
index 3041de1..14876f5 100644
--- a/de/heat-templates/fragments/SrvInstancesBM.yaml
+++ b/de/heat-templates/fragments/SrvInstancesBM.yaml
@@ -48,7 +48,6 @@
     type: string
   docker_ucp_image:
     type: string
-    default: 'docker/ucp:3.2.4'
   hardware_metadata:
     description: The content of lab metadata.
     default: ''
@@ -69,13 +68,13 @@
             $docker_ee_url: { get_param: docker_ee_url }
             $docker_ee_release: { get_param: docker_ee_release }
             $ucp_master_host: { get_param: ucp_master_host }
+            $docker_ucp_image: { get_param: docker_ucp_image }
             $node_metadata: { get_param: metadata }
             $control_network_cidr: { get_param: control_network_cidr }
             $private_floating_interface: { get_param: private_floating_interface }
             $private_floating_network_cidr: { get_param: private_floating_network_cidr }
             $private_floating_interface_ip: { get_attr: [private_floating_server_port, fixed_ips, 0, ip_address] }
             $functions_override: { get_param: functions_override }
-            $docker_ucp_image: { get_param: docker_ucp_image }
 
   inject_files:
     type: "OS::Heat::CloudConfig"