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/opencontainers/runc/restore.go

@@ -80,7 +80,7 @@ using the runc checkpoint command.`,
 		},
 		cli.StringSliceFlag{
 			Name:  "empty-ns",
-			Usage: "create a namespace, but don't restore its properies",
+			Usage: "create a namespace, but don't restore its properties",
 		},
 	},
 	Action: func(context *cli.Context) error {