Update model for offline image

* Fix typos for default offline images names
* Update debmirror repos
* Add entropy for aptly container
* Update MAAS configs

Change-Id: I700216f3727023a36e579da08c0f416b67a94cf8
Related-Prod: PROD-32735
diff --git a/defaults/linux_system_repo.yml b/defaults/linux_system_repo.yml
index 74c5f41..922acc0 100644
--- a/defaults/linux_system_repo.yml
+++ b/defaults/linux_system_repo.yml
@@ -12,6 +12,7 @@
     linux_system_repo_mcp_glusterfs_url: ${_param:linux_system_repo_url}/glusterfs-${_param:linux_system_repo_mcp_glusterfs_version_number}/
     linux_system_repo_mcp_influxdb_url: ${_param:linux_system_repo_url}/influxdb/
     linux_system_repo_mcp_maas_url: ${_param:linux_system_repo_url}/maas/
+    linux_system_repo_mcp_update_maas_url: ${_param:linux_system_repo_update_url}/maas/
     #
     linux_system_repo_mcp_elasticsearch_curator_url: ${_param:linux_system_repo_url}/elasticsearch-curator-5/
     linux_system_repo_mcp_update_elasticsearch_curator_url: ${_param:linux_system_repo_update_url}/elasticsearch-curator-5/