Re-think integration vendoring

- remove docker/docker from  Traefik vendor (unused)
- use `ignore` for all Traefik vendor in integration glide.
- defined only integration specific version of the dependencies.

integration/vendor/github.com/opencontainers/runc/state.go

@@ -0,0 +1,60 @@
+// +build linux
+
+package main
+
+import (
+	"encoding/json"
+	"os"
+
+	"github.com/opencontainers/runc/libcontainer"
+	"github.com/opencontainers/runc/libcontainer/utils"
+	"github.com/urfave/cli"
+)
+
+var stateCommand = cli.Command{
+	Name:  "state",
+	Usage: "output the state of a container",
+	ArgsUsage: `<container-id>
+
+Where "<container-id>" is your name for the instance of the container.`,
+	Description: `The state command outputs current state information for the
+instance of a container.`,
+	Action: func(context *cli.Context) error {
+		if err := checkArgs(context, 1, exactArgs); err != nil {
+			return err
+		}
+		container, err := getContainer(context)
+		if err != nil {
+			return err
+		}
+		containerStatus, err := container.Status()
+		if err != nil {
+			return err
+		}
+		state, err := container.State()
+		if err != nil {
+			return err
+		}
+		pid := state.BaseState.InitProcessPid
+		if containerStatus == libcontainer.Stopped {
+			pid = 0
+		}
+		bundle, annotations := utils.Annotations(state.Config.Labels)
+		cs := containerState{
+			Version:        state.BaseState.Config.Version,
+			ID:             state.BaseState.ID,
+			InitProcessPid: pid,
+			Status:         containerStatus.String(),
+			Bundle:         bundle,
+			Rootfs:         state.BaseState.Config.Rootfs,
+			Created:        state.BaseState.Created,
+			Annotations:    annotations,
+		}
+		data, err := json.MarshalIndent(cs, "", "  ")
+		if err != nil {
+			return err
+		}
+		os.Stdout.Write(data)
+		return nil
+	},
+}