fixed tests due to PHP bug

Tests/Fixtures/GroupsObject.php

@@ -21,6 +21,7 @@ namespace JMS\SerializerBundle\Tests\Fixtures;
 use JMS\SerializerBundle\Annotation\Groups;
 use JMS\SerializerBundle\Annotation\Type;
 
+/** blablub */
 class GroupsObject
 {
     /**

phpunit.xml.dist

@@ -9,7 +9,7 @@
          processIsolation="false"
          stopOnFailure="false"
          syntaxCheck="false"
-         bootstrap="./../../../../app/bootstrap.php.cache"
+         bootstrap="./../../../../app/autoload.php"
 >
          
     <testsuites>