Defaults update for offline: maas

  - add missing maas definition
  - fix regexp for docker debmirror

Change-Id: I46de5ef447fb32f1dbb9317d80bc8b30c2cbbcd5
Prod-related: PROD-26662 (PROD:26662)
Prod-related: PROD-26549 (PROD:26549)
diff --git a/defaults/init.yml b/defaults/init.yml
index 6911315..6c30995 100644
--- a/defaults/init.yml
+++ b/defaults/init.yml
@@ -9,6 +9,7 @@
 - system.defaults.linux_system_repo
 - system.defaults.linux_system_file
 - system.defaults.git
+- system.defaults.maas
 - system.defaults.openstack
 - system.defaults.galera
 - system.defaults.rabbitmq