update defaults

  * Add static files list, for offline build
  * Unhardcode mcp_static_images_url
  * Unhardcode salt_control_*_image

Change-Id: Ia774d16a0f34362535d4f91d3add47b8ecebf7c1
Prod-related: PROD-26662 (PROD:26662)
diff --git a/defaults/init.yml b/defaults/init.yml
index bcface8..ce011df 100644
--- a/defaults/init.yml
+++ b/defaults/init.yml
@@ -7,6 +7,7 @@
 
 classes:
 - system.defaults.linux_system_repo
+- system.defaults.linux_system_file
 - system.defaults.openstack
 - system.defaults.galera
 - system.defaults.rabbitmq
@@ -33,6 +34,7 @@
     # Docker artifact globals
     mcp_docker_registry: 'docker-prod-local.artifactory.mirantis.com'
     mcp_binary_registry: "https://${_param:mcp_docker_registry}/artifactory/binary-prod-local"
+    mcp_static_images_url: "http://images.mirantis.com"
     # Opencontrail globals
     opencontrail_version: 4.0
     # Other