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/pause.go

@@ -2,32 +2,56 @@
 
 package main
 
-import "github.com/codegangsta/cli"
+import "github.com/urfave/cli"
 
 var pauseCommand = cli.Command{
 	Name:  "pause",
 	Usage: "pause suspends all processes inside the container",
-	Action: func(context *cli.Context) {
+	ArgsUsage: `<container-id>
+
+Where "<container-id>" is the name for the instance of the container to be
+paused. `,
+	Description: `The pause command suspends all processes in the instance of the container.
+
+Use runc list to identiy instances of containers and their current status.`,
+	Action: func(context *cli.Context) error {
+		if err := checkArgs(context, 1, exactArgs); err != nil {
+			return err
+		}
 		container, err := getContainer(context)
 		if err != nil {
-			fatal(err)
+			return err
 		}
 		if err := container.Pause(); err != nil {
-			fatal(err)
+			return err
 		}
+
+		return nil
 	},
 }
 
 var resumeCommand = cli.Command{
 	Name:  "resume",
-	Usage: "resume resumes all processes that have been previously paused",
-	Action: func(context *cli.Context) {
+	Usage: "resumes all processes that have been previously paused",
+	ArgsUsage: `<container-id>
+
+Where "<container-id>" is the name for the instance of the container to be
+resumed.`,
+	Description: `The resume command resumes all processes in the instance of the container.
+
+Use runc list to identiy instances of containers and their current status.`,
+	Action: func(context *cli.Context) error {
+		if err := checkArgs(context, 1, exactArgs); err != nil {
+			return err
+		}
 		container, err := getContainer(context)
 		if err != nil {
-			fatal(err)
+			return err
 		}
 		if err := container.Resume(); err != nil {
-			fatal(err)
+			return err
 		}
+
+		return nil
 	},
 }