* Store parsed docker-py / docker API versions in client.
* Began refactoring 'minimal required version' for docker_container options.
* Removing some fake defaults.
* Added changelog.
* Improve tests (check older docker versions).
* Fix comparison. The breaking point is not docker-py 2.0.0, but 1.10.0.
(Verified by testing with these versions.)
* Move docker-py/API version detection to setup_docker.
* Add YAML document starter.
* docker_network requirement for docker-py was bumped to 1.10.0 in #47492.
* Sorting args.
* Doing comparisons of options with container parameters in a more context-sensitive way.
This prevents unnecessary restarts, or missing restarts (f.ex. if parameters are removed from ``cmd``).
* Make blkio_weight work.
* Fix cap_drop idempotency problem.
* Making groups idempotent if it contains integers.
* Make cpuset_mems work.
* Make dns_opts work.
* Fixing log_opts: docker expects string values, returns error for integer.
* Adding tests from felixfontein/ansible-docker_container-test#2.
* Make uts work.
* Adding changelog entry.
* Forgot option security_opts.
* Fixing typo.
* Explain strict set(dict) comparison a bit more.
* Improving idempotency tests.
* Making dns_servers a list, since the ordering is relevant.
* Making dns_search_domains a list, since the ordering is relevant.
* Improving dns_search_domains/dns_servers.
* Fixing entrypoint test.
* Making sure options are only supported for correct docker-py versions.
