EZP-22045: Implemented base login in Symfony security context
EZP-22045: Inject current user in legacy kernel
EZP-22045: Ensure Symfony login is triggered when legacy sends 401 or 403 (legacy_mode: false)
EZP-22045: Moved ezpublish_legacy.security_mapper definition to security.yml
EZP-22045: Ignore user injection when in legacy_mode
EZP-22045: Disable user/login and user/logout legacy modules

Only when not in legacy_mode, to enforce usage of Symfony native form_login
EZP-22045: Added tests for pre/post build legacy kernel events
EZP-22045: Added tests for Security legacy mapper