docker modules: various adjustments (#51700)

* Move docker_ module_utils into subpackage.

* Remove docker_ prefix from module_utils.docker modules.

* Adding jurisdiction for module_utils/docker to $team_docker.

* Making docker* unit tests community supported.

* Linting.

* Python < 2.6 is not supported.

* Refactoring docker-py version comments. Moving them to doc fragments. Cleaning up some indentations.

lib/ansible/modules/cloud/docker/docker_compose.py

@@ -140,22 +140,14 @@ options:
     default: 10
 
 extends_documentation_fragment:
-    - docker
+  - docker
+  - docker.docker_py_1_documentation
 
 requirements:
-    - "python >= 2.6"
-    - "docker-py >= 1.8.0"
-    - "Please note that the L(docker-py,https://pypi.org/project/docker-py/) Python
-       module has been superseded by L(docker,https://pypi.org/project/docker/)
-       (see L(here,https://github.com/docker/docker-py/issues/1310) for details).
-       For Python 2.6, C(docker-py) must be used. Otherwise, it is recommended to
-       install the C(docker) Python module. Note that both modules should I(not)
-       be installed at the same time. Also note that when both modules are installed
-       and one of them is uninstalled, the other might no longer function and a
-       reinstall of it is required."
-    - "docker-compose >= 1.7.0"
-    - "Docker API >= 1.20"
-    - "PyYAML >= 3.11"
+  - "docker-py >= 1.8.0"
+  - "docker-compose >= 1.7.0"
+  - "Docker API >= 1.20"
+  - "PyYAML >= 3.11"
 '''
 
 EXAMPLES = '''
@@ -468,7 +460,7 @@ except ImportError as exc:
     HAS_COMPOSE_EXC = str(exc)
     DEFAULT_TIMEOUT = 10
 
-from ansible.module_utils.docker_common import AnsibleDockerClient, DockerBaseClass
+from ansible.module_utils.docker.common import AnsibleDockerClient, DockerBaseClass
 
 
 AUTH_PARAM_MAPPING = {