Skip not mapped public properties in SchemaValidator

lib/Doctrine/ORM/Tools/SchemaValidator.php

@@ -241,6 +241,11 @@ class SchemaValidator
                 continue;
             }
 
+            if ( ! isset($class->fieldMappings[$publicAttr->getName()]) &&
+                ! isset($class->associationMappings[$publicAttr->getName()])) {
+                continue;
+            }
+
             $ce[] = "Field '".$publicAttr->getName()."' in class '".$class->name."' must be private ".
                     "or protected. Public fields may break lazy-loading.";
         }