Make all doc fragments, module utils, and plugin utils private (#1144)

* Make all doc fragments, module utils, and plugin utils private.

* Remove some unused and no longer needed imports.

This hopefully also fixes the CI issues, which do not happen locally for me...

* Fix formatting.

* Try to make CI happy, again.

* Fix imports.

* Lint.

plugins/modules/docker_swarm_info.py

@@ -23,12 +23,12 @@ author:
   - Piotr Wojciechowski (@WojciechowskiPiotr)
 
 extends_documentation_fragment:
-  - community.docker.docker
-  - community.docker.docker.docker_py_1_documentation
-  - community.docker.attributes
-  - community.docker.attributes.actiongroup_docker
-  - community.docker.attributes.info_module
-  - community.docker.attributes.idempotent_not_modify_state
+  - community.docker._docker
+  - community.docker._docker.docker_py_1_documentation
+  - community.docker._attributes
+  - community.docker._attributes.actiongroup_docker
+  - community.docker._attributes.info_module
+  - community.docker._attributes.idempotent_not_modify_state
 
 options:
   nodes:
@@ -194,13 +194,13 @@ except ImportError:
     # missing Docker SDK for Python handled in ansible.module_utils.docker_common
     pass
 
-from ansible_collections.community.docker.plugins.module_utils.common import (
+from ansible_collections.community.docker.plugins.module_utils._common import (
     RequestException,
 )
-from ansible_collections.community.docker.plugins.module_utils.swarm import (
+from ansible_collections.community.docker.plugins.module_utils._swarm import (
     AnsibleDockerSwarmClient,
 )
-from ansible_collections.community.docker.plugins.module_utils.util import (
+from ansible_collections.community.docker.plugins.module_utils._util import (
     DockerBaseClass,
     clean_dict_booleans_for_docker_api,
 )