* Move some code from plugin_utils to module_utils.
* First version of docker_container_exec module.
* Linting.
* Avoid using display.
* Move common socket_handler code to module_utils.
* Add module support, use it in docker_container_exec.
* Add tests.
* Fix copyright lines.
* Add this and other 'new' modules to README.
* Apply suggestions from code review
Co-authored-by: Andrew Klychkov <aaklychkov@mail.ru>
* Update plugins/modules/docker_container_exec.py
Co-authored-by: Andrew Klychkov <aaklychkov@mail.ru>