Doctrinebundle: Deprecation warning in Symfony 4.4

[garak]

In latest Symfony (version 4.4.0-DEV), this bundle is causing the following deprecation warning:

The "Doctrine\Bundle\DoctrineBundle\Registry" class implements "Symfony\Bridge\Doctrine\RegistryInterface" that is deprecated since Symfony 4.4, use Doctrine\Common\Persistence\ManagerRegistry instead.

[alcaeus]

This is a deprecation that can't be solved without a BC break. It is already fixed in 2.0, which will support Symfony 5. Thanks for bringing this up.

[nicolas-grekas]

We could add an adhoc rule in DebugClassLoader to skip this deprecation if this is reported too often.

[alcaeus]

We allow a single deprecation warning in the 4.4 tests to account for this, but if you can exclude this specific error that'd be great!