Prepare for upcoming changes in GaudiAlg
This is a backward compatible change needed to prepare for gaudi/Gaudi!1444 (merged).
- explicitly include GaudiAlg/FunctionalUtilities.h and Gaudi/Accumulators.h
- explicitly set Gaudi::Functional base class with useLegacyAlgorithm or useAlgorithm where needed
Part of a set of independent MRs: Rec!3395 (merged) Allen!1193 (merged) !975 (merged) Boole!466 (merged) LHCb!4082 (merged)
Edited by Marco Clemencic