Parametrize mcp_docker_registry host

Related-Bug: PROD-22480 (PROD:22480)

Change-Id: I36ad55a1960f6c8e025d9c967bbc7658927fc872
diff --git a/jenkins/client/job/deploy/lab/deploy.yml b/jenkins/client/job/deploy/lab/deploy.yml
index 624e553..b1deafa 100644
--- a/jenkins/client/job/deploy/lab/deploy.yml
+++ b/jenkins/client/job/deploy/lab/deploy.yml
@@ -1,5 +1,6 @@
 parameters:
   _param:
+    mcp_docker_registry: 'docker-prod-local.artifactory.mirantis.com'
     jenkins_deploy_jobs: []
     heat_stack_zone_job_param:
       type: string
@@ -180,7 +181,7 @@
               TEST_TEMPEST_IMAGE:
                 type: string
                 description: "Tempest docker image"
-                default: "docker-prod-local.artifactory.mirantis.com/mirantis/oscore/rally-tempest"
+                default: "${_param:mcp_docker_registry}/mirantis/oscore/rally-tempest"
               TEST_TEMPEST_TARGET:
                 type: string
                 description: "Node to run tests"