fix: namespace positioning

Author: matiasperrone-exo

app/Http/Controllers/Apis/Marketplace/AppliancesApiController.php

@@ -1,4 +1,7 @@
-<?php namespace App\Http\Controllers;
+<?php
+
+namespace App\Http\Controllers;
+
 /**
  * Copyright 2017 OpenStack Foundation
  * Licensed under the Apache License, Version 2.0 (the "License");