Update tests/DoctrineTest/Doctrine_UnitTestCase.php

Co-authored-by: Emanuele Panzeri <thepanz@gmail.com>

Author: alquerci

tests/DoctrineTest/Doctrine_UnitTestCase.php

@@ -58,7 +58,7 @@ class Doctrine_UnitTestCase extends UnitTestCase
     protected $init = false;
 
     /**
-     * @var Doctrine_Connection
+     * @var Doctrine_Connection[]
      */
     private $additionalConnections = array();