* Extend confd test case to test for env var propagation
* Env vars set in conf.d files are expected to propagate
* Lock needs to be acquired when instantiating script
* Try running tests in Docker
* Spawn new container for each test
* Store test artifacts outside of mount
* When requested, build up to date image in test script
* sudo is unneccessary in containerized test env
* Skip azure test
* Backdate fixture file in JSON database
* Pin versions for azure tools
* Mount temp volume for /var/lib/docker to prevent dangling ones created by VOLUME instruction
* Fail backdating tests with message
* Add some documentation on test setup
* Cache images
* Run compose stacks with shortened default timeout
* Retry on lock being unavailable
* Refactor locking to return plain error
* Collect LockedTime in stats
* Add test case
* Add documentation for LOCK_TIMEOUT
* Log in case lock needs to be awaited
* Release resources created for awaiting lock
* Allow mounting of config directory for multiple schedules
* Add docs for conf.d feature
* Fix behavior on multiple files
* Define default case first in entrypoint script
