fix code reviews

Author: mathroc

tests/Constraints/DefaultPropertiesTest.php

@@ -149,14 +149,14 @@ public function getValidTests()
                 '{"items":[{"default":null}]}',
                 '[null]'
             ),
-            array(// #21 items might be an array of schema (instead of an array of schema)
+            array(// #21 items might be a schema (instead of an array of schema)
                 '[{}]',
-                '{"items":{"properties":{"propertyOne":{"default":"valueOne"}},"required":[]}}',
+                '{"items":{"properties":{"propertyOne":{"default":"valueOne"}}}}',
                 '[{"propertyOne":"valueOne"}]'
             ),
-            array(// #22 if items is not an array, it does not create new item
+            array(// #22 if items is not an array, it does not create a new item
                 '[]',
-                '{"items":{"properties":{"propertyOne":{"default":"valueOne"}},"required":[]}}',
+                '{"items":{"properties":{"propertyOne":{"default":"valueOne"}}}}',
                 '[]'
             ),
         );