Streamline FastJetBuiler (follow up to !954)

Gerhard Raven requested to merge follow-up-to-954 into master
  • add support for using a few (fastjet) enums as Gaudi::Property
  • prefer enums to be Gaudi::Property - this allow to have readable string in the configuration as as opposed to having magic integer values, and avoids the need for updateHandlers
  • follow introduction of LHCb::Algorithm as frontend to Gaudi::Functional
  • avoid 'OUT&' as input arguments to functions, prefer to return them by value instead

must be applied in conjunction with Moore!976 (merged)

Edited by Gerhard Raven

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