This PR was submitted for the 2.8 branch but it was merged into the 2.7 branch instead (closes#16087).Discussion----------Fixing typo in variable name```phpforeach ($reflectionClass->getProperties() as $property) {    if (!isset($attributeMetadata[$property->name])) {        $attributesMetadata[$property->name] = new AttributeMetadata($property->name);        $classMetadata->addAttributeMetadata($attributesMetadata[$property->name]);    }    if ($property->getDeclaringClass()->name === $className) {        foreach ($this->reader->getPropertyAnnotations($property) as $groups) {            if ($groups instanceof Groups) {                foreach ($groups->getGroups() as $group) {                    $attributesMetadata[$property->name]->addGroup($group);                }            }            $loaded = true;        }    }}```This `$attributeMetadata` does not exists in this `foreach` context and the goal of this condition could be unexpected.| Q             | A| ------------- | ---| Bug fix?      | yes| New feature?  | no| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets | noneCommits-------89499ff Fixing typo in variable name