Generalize Gaudi::Functional to support LHCb-style conditions handles
- adopt to the slightly different
getinterface of LHCb-style condition handle, which requires a few additional arguments, by introducing an ADL-customizable, SFINAE friendly freestandinggetmethod - adopt to the slightly different
keyandobjKeyinterface, by introducing an ADL-customizable, SFINAE friendly freestandinggetKeymethod.
Edited by Gerhard Raven