Huge role refactoring/cleanup. Other commits will propably follow. Because some bugs will exist. Still important for longrun and also for auto docs/help/slideshow generation

roles/maintenance-lock/tasks/main.yml

@@ -0,0 +1,13 @@
+---
+- name: create {{path_system_lock_script}}
+  copy:
+    src: maintenance-lock.py
+    dest: "{{path_system_lock_script}}"
+  when: run_once_system_maintenance_lock is not defined
+
+## Runtime Variable Setting
+
+- name: run the system_maintenance_service_freezer tasks once
+  set_fact:
+    run_once_system_maintenance_lock: true
+  when: run_once_system_maintenance_lock is not defined