Use meta_enum for Calo::Enum::Datatype
Depends on !2567 (merged) and !2566 (merged) Superseeds !2565 (closed) Goes along with Rec!2078 (merged)
Depends on !2567 (merged) and !2566 (merged) Superseeds !2565 (closed) Goes along with Rec!2078 (merged)