fix mocking PDO

tests/Doctrine/Tests/DBAL/DriverManagerTest.php

@@ -140,9 +140,7 @@ class DriverManagerTest extends \Doctrine\Tests\DbalTestCase
 
     public function databaseUrls()
     {
-        $pdoMock = $this->getMockBuilder('PDO')
-            ->disableOriginalConstructor()
-            ->getMock();
+        $pdoMock = $this->getMock('Doctrine\Tests\Mocks\PDOMock');
 
         return array(
             'simple URL' => array(

tests/Doctrine/Tests/Mocks/PDOMock.php

+<?php
+
+namespace Doctrine\Tests\Mocks;
+
+class PDOMock extends \PDO
+{
+    public function __construct()
+    {
+    }
+}