Add validator constraints templates, convert from Util/Filter.
Revamp ResponseType with Validator.
Filter invalid_request once together.
Revamp TokenController with Validator.
Revamp AuthorizationCodeGrantTypeHandler with Validator.
Rollback, only revamp Controller with Validator.
Powerup ResponseTypeHandlerFactory, prepare for ResponseType/* with Validator.
Revamp ResponseType/* with Validator.
Powerup TokenTypeHandlerFactory.
Powerup GrantTypeHandlerFactory, prepare for GrantType/* with Validator.
Revamp GrantType/* with Validator.
Finally, replace legacy Util/Filter with Validator.
Revamp DebugController with TokenTypeHandlerFactory.
Powerup ResourceTypeHandlerFactory.
Validate input for Security/Firewall/*.
Improve code coverage.
Merge branch 'feature/Validator' into develop