* 2.3:
[Debug] fixed unit tests
Avoid notice from being *eaten* by fatal error.
Teardown used wrong property
Modified guessDefaultEscapingStrategy to not escape txt templates
Fix DateType for 32bits computers.
Fixed the registration of validation.xml file when the form is disabled
Fixes#9633, Removed dependency to Symfony\Bundle\FrameworkBundle\Tests\TestCase
[Validator] Replaced inexistent interface.
When getting the session's id, check if the session is not closed
Adjusting CacheClear Warmup method to namespaced kernels
Conflicts:
src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php
