Changelog:
https://github.com/sensiolabs/SensioFrameworkExtraBundle/blob/master/CHANGELOG.md
Also replace the annotations Sensio\Bundle\FrameworkExtraBundle\Configuration\Route and Sensio\Bundle\FrameworkExtraBundle\Configuration\Method with Symfony\Component\Routing\Annotation\Route
Seems it needs to be changed in:
core/tests/Fixtures/TestBundle/Controller/CustomActionController.php
core/tests/Fixtures/TestBundle/Controller/DummyValidationController.php
to avoid deprecation notices during testing