fix script running when specify in user-data

Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>

system/systemd.go

@@ -173,25 +173,9 @@ func nullOrEmpty(path string) (bool, error) {
 }
 
 func ExecuteScript(scriptPath string) (string, error) {
-	/*
-		props := []dbus.Property{
-			dbus.PropDescription("Unit generated and executed by coreos-cloudinit on behalf of user"),
-			dbus.PropExecStart([]string{"/bin/bash", scriptPath}, false),
-		}
-
-		base := path.Base(scriptPath)
-		name := fmt.Sprintf("coreos-cloudinit-%s.service", base)
-
-		log.Printf("Creating transient systemd unit '%s'", name)
-
-		conn, err := dbus.New()
-		if err != nil {
-			return "", err
-		}
-
-		_, err = conn.StartTransientUnit(name, "replace", props...)
-		return name, err
-	*/
+	if err := exec.Command("/bin/sh", "-c", scriptPath).Run(); err == nil {
+		return scriptPath, nil
+	}
 	return "", nil
 }