Parametrize mcp_docker_registry host

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

Change-Id: I36ad55a1960f6c8e025d9c967bbc7658927fc872
diff --git a/docker/swarm/stack/decapod.yml b/docker/swarm/stack/decapod.yml
index bd86062..2d915fc 100644
--- a/docker/swarm/stack/decapod.yml
+++ b/docker/swarm/stack/decapod.yml
@@ -1,12 +1,13 @@
 parameters:
   _param:
+    mcp_docker_registry: 'docker-prod-local.artifactory.mirantis.com'
     docker_decapod_fe_replicas: 3
     decapod_version: latest
-    docker_image_admin: docker-prod-local.artifactory.mirantis.com/mirantis/ceph/decapod/admin:${_param:decapod_version}
-    docker_image_db: docker-prod-local.artifactory.mirantis.com/mirantis/ceph/decapod/db:${_param:decapod_version}
-    docker_image_api: docker-prod-local.artifactory.mirantis.com/mirantis/ceph/decapod/api:${_param:decapod_version}
-    docker_image_controller: docker-prod-local.artifactory.mirantis.com/mirantis/ceph/decapod/controller:latest
-    docker_image_frontend: docker-prod-local.artifactory.mirantis.com/mirantis/ceph/decapod/frontend:${_param:decapod_version}
+    docker_image_admin: ${_param:mcp_docker_registry}/mirantis/ceph/decapod/admin:${_param:decapod_version}
+    docker_image_db: ${_param:mcp_docker_registry}/mirantis/ceph/decapod/db:${_param:decapod_version}
+    docker_image_api: ${_param:mcp_docker_registry}/mirantis/ceph/decapod/api:${_param:decapod_version}
+    docker_image_controller: ${_param:mcp_docker_registry}/mirantis/ceph/decapod/controller:latest
+    docker_image_frontend: ${_param:mcp_docker_registry}/mirantis/ceph/decapod/frontend:${_param:decapod_version}
   docker:
     client:
       stack: