Use doctrine/bundle 2

[lazybobcat]

Use doctrine/doctrine-bundle 2.x

The recent update of doctrine/doctrine-bundle removed RegistryInterface : https://github.com/doctrine/DoctrineBundle/blob/master/UPGRADE-2.0.md

Registry no longer implements Symfony\Bridge\Doctrine\RegistryInterface.

It was breaking Sonata PageBundle and @greg0ire had to force this bundle compatibility to doctrine/doctrine-bundle 1

This pull request allow the usage of doctrine/doctrine-bundle 2.x.

I am targeting this branch, because even if it changes the signature of two classes' constructors, it also forces doctrine/doctrine-bundle to ^2.0. Also, the linked issue of symfony/dependency-injection (cdd30d7) doesn't seem to be an issue with this change errata: it still seems to be an issue as the tests don't pass, even if I have no visible trouble in my application. I reverted this change.

Closes #1094

Changelog

### Changed
- BlockInteractor constructor's argument $registry is now an instance of Doctrine\Persistence\ManagerRegistry
- Transformer constructor's argument $registry is now an instance of Doctrine\Persistence\ManagerRegistry
- Requires doctrine/doctrine-bundle ^1.12.3 or ^2.0 and doctrine/persistence ^1.3.3

[lazybobcat]

The only test that fails is "prefer-lowest" due to incompatibility with doctrine-bundle 2.
I don't know how to keep compatibility with doctrine-bundle 1 and 2 so I don't know what you want to do.

/cc @greg0ire @core23

[core23]

Thanks @Lo-X

[lazybobcat]

Thank you guys, I learned a lot!