Add a variable to control the stop tasks

roles/matrix-base/defaults/main.yml

@@ -47,6 +47,7 @@ run_setup: true
 run_import_postgres: true
 run_upgrade_postgres: true
 run_start: true
+run_stop: true
 run_register_user: true
 run_update_user_password: true
 run_import_sqlite_db: true

roles/matrix-common-after/tasks/main.yml

@@ -4,5 +4,6 @@
     - start
 
 - import_tasks: "{{ role_path }}/tasks/stop.yml"
+  when: run_stop
   tags:
     - stop