* General test improvements.
* Adjust tests to older docker-py versions.
* docker_swarm_server_info: work around problems with older docker-py versions
* Bump minimal docker-py version for options network_filters and disk_usage.
* More general test improvements.
* Correct usage of docker_image.
* Put files into output directory.
* Speed up test.
* Remove old check.
* Return UnlockKey
* Add changelog fragment
* Add method to check if a parameter exists in diffs
* Add method to get swarm unlock key
* Add option unlock_key
* Only return unlock key when created or changed
* Rename difference check
* Extend unlock key example
* Assert that unlock_key is a string
* Fix docker_swarm_info authors
* Don’t silence APIErrors
* Test unlock_key on unlocked swarm
* Catch APIError when retrieving unlock key
* Better return value description
* Lint
* Fix UnlockKey return value documentation
Co-Authored-By: hannseman <hannes@5monkeys.se>
* Get unlock key safely
Co-Authored-By: hannseman <hannes@5monkeys.se>
* Return None on empty UnlockKey
* Assert swarm_unlock_key is undefined if unqueried
* Add documentation about swarm_info unlock_key
* Add change log fragment for unlock_key option
* Revert "Add change log fragment for unlock_key option"
This reverts commit e3cb2325b552e5d14cc3f42b33a86bf3ee84d3b9.
* Use generator expression instead
* Restart docker more decisively
* Use systemctl kill
Co-Authored-By: hannseman <hannes@5monkeys.se>
* Try to restart docker daemon
