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`)

vendor/github.com/libkermit/docker/inspect.go

@@ -0,0 +1,17 @@
+package docker
+
+import (
+	"golang.org/x/net/context"
+
+	"github.com/docker/docker/api/types"
+)
+
+// Inspect returns the container informations
+func (p *Project) Inspect(containerID string) (types.ContainerJSON, error) {
+	container, err := p.Client.ContainerInspect(context.Background(), containerID)
+	if err != nil {
+		return types.ContainerJSON{}, err
+	}
+
+	return container, nil
+}