Add missing import

Author: derrabus

tests/Tests/ORM/Functional/Ticket/GH11149/EagerProduct.php

@@ -5,6 +5,7 @@
 namespace Doctrine\Tests\ORM\Functional\Ticket\GH11149;
 
 use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
 
 /**