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-check/check.go

@@ -1,36 +0,0 @@
-// Package docker aims to provide simple "helper" methods to ease the use of
-// docker in (integration) tests using the go-check testing package.
-//
-// It does support a subset of options compared to actual client api, as it
-// is more focused on needs for integration tests.
-package docker
-
-import (
-	"github.com/go-check/check"
-
-	"github.com/docker/engine-api/client"
-	"github.com/libkermit/docker"
-)
-
-// Project holds docker related project attributes, like docker client, labels
-// to put on the containers, and so on.
-type Project struct {
-	project *docker.Project
-}
-
-// NewProjectFromEnv creates a project with a client that is build from environment variables.
-func NewProjectFromEnv(c *check.C) *Project {
-	client, err := client.NewEnvClient()
-	c.Assert(err, check.IsNil, check.Commentf("Error while getting a docker client from env"))
-	return NewProject(client)
-}
-
-// NewProject creates a project with the given client and the default attributes.
-func NewProject(client client.APIClient) *Project {
-	return &Project{
-		project: &docker.Project{
-			Client: client,
-			Labels: docker.KermitLabels,
-		},
-	}
-}