Made AuthorizationRequest into a real interface
Removed DefaultAuthorizationRequest from AbstractTokenGranter
Removed DefaultAuthorizationRequest from AuthorizationEndpoint
Removed DefaultauthorizationRequest from TokenEndpoint
Removed DefaultauthorizationRequest from TokenEndpointAuthenticationFilter
Removed ? extends from authorities Collection
Implemented stub methods on DefaultAuthorizationRequest
filled in setters;
Added comment to remember to remove all PUTs into the authorization parameters map, since this should be static/immutable. Changes should be stored elsewhere.