end play after deleting subscription in AWX

roles/matrix-awx/tasks/delete_awx_templates.yml

@@ -304,3 +304,11 @@
     tower_oauthtoken: "{{ tower_token.stdout }}"
     validate_certs: yes
   when: matrix_domain is defined
+
+- name: Set boolean value to exit playbook
+  set_fact:
+    end_playbook: true
+
+- name: End playbook if this task list is called.
+  meta: end_play
+  when: end_playbook is defined and end_playbook|bool