Update traefik dependencies (docker/docker and related) (#1823)

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`)

integration/vendor/github.com/libkermit/docker/status.go

@@ -1,25 +0,0 @@
-package docker
-
-// IsRunning checks if the container is running or not
-func (p *Project) IsRunning(containerID string) (bool, error) {
-	return p.containerStatus(containerID, "running")
-}
-
-// IsStopped checks if the container is running or not
-func (p *Project) IsStopped(containerID string) (bool, error) {
-	return p.containerStatus(containerID, "stopped")
-}
-
-// IsPaused checks if the container is running or not
-func (p *Project) IsPaused(containerID string) (bool, error) {
-	return p.containerStatus(containerID, "paused")
-}
-
-func (p *Project) containerStatus(containerID, status string) (bool, error) {
-	containerJSON, err := p.Inspect(containerID)
-	if err != nil {
-		return false, err
-	}
-	return containerJSON.State.Status == status, nil
-
-}