[stable-1] Fix docker tests (#1398)

* Adjust version_added, re-place tests. (#34)

* Template docker test containers.

* Forgot to adjust test.

tests/integration/targets/setup_docker_registry/tasks/setup.yml

@@ -42,7 +42,7 @@
   - name: Start test registry
     docker_container:
       name: '{{ docker_registry_container_name_registry }}'
-      image: registry:2.6.1
+      image: "{{ docker_test_image_registry }}"
       ports: 5000
     register: registry_container