[OptionsResolver] Fixed deprecated functionality usage

Author: wouterj

cookbook/form/create_form_type_extension.rst

@@ -216,7 +216,7 @@ it in the view::
          */
         public function setDefaultOptions(OptionsResolverInterface $resolver)
         {
-            $resolver->setOptional(array('image_path'));
+            $resolver->setDefined(array('image_path'));
         }
 
         /**

cookbook/form/data_transformers.rst

@@ -139,12 +139,8 @@ by calling ``addModelTransformer`` (or ``addViewTransformer`` - see
                 ->setDefaults(array(
                     'data_class' => 'Acme\TaskBundle\Entity\Task',
                 ))
-                ->setRequired(array(
-                    'em',
-                ))
-                ->setAllowedTypes(array(
-                    'em' => 'Doctrine\Common\Persistence\ObjectManager',
-                ));
+                ->setRequired(array('em'))
+                ->setAllowedTypes('em', 'Doctrine\Common\Persistence\ObjectManager')
 
             // ...
         }