BDD: add implementation for read single content type group (by identifier)
Fix EZP-22827: Having formtoken active, it's not possible to edit eZ Demo frontpage
Fix EZP-22643: "Missing form token from Request " when creating an object after clearing cache

Should also fix EZP-22589: "Missing form token from Request" when trying to vote a poll from a block poll with a logged user.

Was a regression from combination of:

* https://jira.ez.no/browse/EZP-22414
* https://jira.ez.no/browse/EZP-22531
* https://jira.ez.no/browse/EZP-22210
EZP-22662: move loaders and compiler passes to Core
EZP-22662: move settings to Core pt. 1
EZP-22662: extract external storages from fieldtypes.yml
EZP-22662: extract field type services from fieldtypes.yml
EZP-22662: move settings to Core pt. 2
EZP-22662: extract repository and services from papi.yml
EZP-22662: add Core IO configuration
EZP-22662: add Core field type services configuration
EZP-22662: move settings to Core pt. 3
EZP-22662: remove old container and settings
EZP-22662: add createConnectionFromDSN() to ConnectionHandler
EZP-22662: add connection service to Core LSE config
EZP-22662: use Core root dir parameter
EZP-22662: move Cache params to Core and Cache factory to bundle
EZP-22662: copy ezpage HashConverter config to Core
EZP-22662: add settings.yml
EZP-22662: add integration tests configurations