Update traefik dependencies (docker/docker and related)
- Update dependencies
- Fix compilation problems
- Remove vdemeester/docker-events (in docker api now)
- Remove `integration/vendor`
- Use `testImport`
- update some deps.
- regenerate the lock from scratch (after a `glide cc`)
GH #559 points out that the logging of the elapsed time is inconsistent
depending on the scale of the measured time; this is due to Duration’s
String handling.
With this PR, I propose that traefik logs millis, and not fractions of
millis.