Model for restart policies.
Sketch of FLOC-1021.
Work around hynex/charactersitic#22.
Get rid of serialize_to_docker in _model.
Fix Application (default_values and Attribute are incompatible).
Make tests pass for _model.
test-case-name
Unit.__repr__.
Add tests for restart policies.
Make maximum_retry_count optional.
Implementation.
Copied environment variables test and comment over
lint
Addressed review comment: Added separate test for environment variable usage in isolation, without moving.
Addressed review comment: Moved `addCleanup`s
Addressed review comment: Hardcoded SQL queries
Added PyMySQL to setup.py
Skip relevant tests if PyMySQL is not installed
A test to demonstrate the race condition in DockerClient.list
Simplify