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/list.go

@@ -0,0 +1,25 @@
+package docker
+
+import (
+	"fmt"
+
+	"golang.org/x/net/context"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/filters"
+)
+
+// List lists the containers managed by kermit
+func (p *Project) List() ([]types.Container, error) {
+	filters := filters.NewArgs()
+	for key, value := range p.Labels {
+		filters.Add("label", fmt.Sprintf("%s=%s", key, value))
+	}
+	containers, err := p.Client.ContainerList(context.Background(), types.ContainerListOptions{
+		Filters: filters,
+	})
+	if err != nil {
+		return nil, err
+	}
+	return containers, nil
+}