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/checkpoint.go

@@ -33,7 +33,7 @@ checkpointed.`,
 		cli.BoolFlag{Name: "file-locks", Usage: "handle file locks, for safety"},
 		cli.BoolFlag{Name: "pre-dump", Usage: "dump container's memory information only, leave the container running after this"},
 		cli.StringFlag{Name: "manage-cgroups-mode", Value: "", Usage: "cgroups mode: 'soft' (default), 'full' and 'strict'"},
-		cli.StringSliceFlag{Name: "empty-ns", Usage: "create a namespace, but don't restore its properies"},
+		cli.StringSliceFlag{Name: "empty-ns", Usage: "create a namespace, but don't restore its properties"},
 	},
 	Action: func(context *cli.Context) error {
 		if err := checkArgs(context, 1, exactArgs); err != nil {