* Decreasing docker_swarm requirements.
* Fixing docker-py / docker API version requirements, and some comments.
* Add changelog.
* Only send parameters specified by user to docker daemon.
* Extend labels test: not specifying == keep labels.
* Bump minimally required docker-py version for docker_node and docker_node_facts to 2.4.0.
* Prevent crashing when publish or healthcheck is not provided.
* Similarly to docker_swarm tests, only execute docker_node tests on real VMs and restart docker daemon when tests are done.
* Add more tests.
* Added tests for CA options.
* Don't run in docker-in-docker situations where docker daemon becoming instable is really dangerous. Also, restart docker daemon after tests.
* Only run CA tests when openssl_certificate can be run (which is not the case for RHEL7, see #34054).
* Add comment on why docker-based CI runs are skipped.
