[Serializer] Can't use config files without bundle #21187
Description
| Q | A |
|---|---|
| Bug report? | no |
| Feature request? | yes |
| BC Break report? | no |
| RFC? | yes |
| Symfony version | 3.3 |
Similar to #15655 for the serializer.
Actually, the serializer configuration files must reside in a bundle to be detected e.g. AppBundle/Resources/config/serialization.
On the other hand, translations files are loaded from bundles and from the global app/Resources/translations directory. For doctrine, the path of mapping files can be configured.
Shouldn't we try to detect those configuration files in %kernel.root_dir%/Resources/config/serialization as well?