They should only be loaded from `app/config/services_test.yml`.
Otherwise we'll have an issue when clearing the cache in prod env:
```
In DefinitionErrorExceptionPass.php line 54:
Class "Doctrine\Bundle\FixturesBundle\Fixture" not found while loading "Wal
labag\AnnotationBundle\DataFixtures\AnnotationFixtures".
```
Also update deps to latest.
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