fix some tests as a file was missing

plugins/PiwikPro/config/test.php

+<?php
+
+use Piwik\Tests\Framework\Mock\PiwikPro\Advertising;
+
+return array(
+    'Piwik\PiwikPro\Advertising' => function () {
+        return new Advertising();
+    }
+);

plugins/Widgetize/tests/System/WidgetTest.php

@@ -13,7 +13,6 @@ use Piwik\Http\ControllerResolver;
 use Piwik\Piwik;
 use Piwik\Plugins\Goals;
 use Piwik\Plugins\Widgetize\tests\Fixtures\WidgetizeFixture;
-use Piwik\Tests\Framework\Mock\PiwikPro\Advertising;
 use Piwik\Tests\Framework\TestCase\SystemTestCase;
 use Piwik\WidgetsList;
 
@@ -847,19 +846,6 @@ class WidgetTest extends SystemTestCase
                 )
         );
     }
-
-    /**
-     * Use this method to return custom container configuration that you want to apply for the tests.
-     * This configuration will override Fixture config.
-     *
-     * @return array
-     */
-    public static function provideContainerConfigBeforeClass()
-    {
-        return array(
-            'Piwik\PiwikPro\Advertising' => new Advertising()
-        );
-    }
 }
 
 

tests/PHPUnit/Framework/Mock/PiwikPro/Advertising.php

+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ */
+namespace Piwik\Tests\Framework\Mock\PiwikPro;
+
+class Advertising extends \Piwik\PiwikPro\Advertising
+{
+    public function __construct()
+    {
+    }
+
+    public function arePiwikProAdsEnabled()
+    {
+        return true;
+    }
+}
\ No newline at end of file