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/main_solaris.go

@@ -0,0 +1,21 @@
+// +build solaris
+
+package main
+
+import "github.com/urfave/cli"
+
+var (
+	checkpointCommand cli.Command
+	eventsCommand     cli.Command
+	restoreCommand    cli.Command
+	specCommand       cli.Command
+	killCommand       cli.Command
+	deleteCommand     cli.Command
+	execCommand       cli.Command
+	initCommand       cli.Command
+	listCommand       cli.Command
+	pauseCommand      cli.Command
+	resumeCommand     cli.Command
+	startCommand      cli.Command
+	stateCommand      cli.Command
+)