It appears that when #3001 combined the Dockerfiles, the bit that adds
the `atlantis` user was not added to the Debian build stage
Also correct some trailing spaces and missing EOL in
`docker-compose.yml`
* Initial build out of redis backend
* Regenerate locking mocks and matchers
* More test cleanup
* More test fixes
* Added tests for redis
* Test fix
* Linting fix
* Dcos update
* Update redis.go
* Update server.go
* Adding nolint to RedisDB struct
