First mock implementation of DeCalorimeter and associated objects

This is part of a set of MRs : !104 (merged) LHCb!3282 (merged) Lbcom!583 (merged) Rec!2584 (merged) Phys!999 (merged) Allen!684 (merged) Moore!1054 (merged) Boole!361 (merged) !17 (merged) Gauss!766 (merged) Panoramix!107 (merged) Alignment!214 (merged)

All functions needed by LHCb projects are present but they are all empty, returning 0 or empty containers.