LegacyValidator doesn't provide B/C for validatePropertyValue #11139
Description
In 2.4 we can call validator on property this way:
$errors = $this->validator->validatePropertyValue(
'My/CustomBundle/Entity/Test',
'customProperty ',
$value
);
but in 2.5 validatePropertyValue generates
PHP Warning: spl_object_hash() expects parameter 1 to be object, string given in /vendor/symfony/symfony/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php on line 214
caused by $cacheKey = spl_object_hash($object);