Migrate the MuonCandidateTool to use the BeamCondSvc
As suggested on ATLPHYSVAL-619, the MuonCandidateTool will now retrieve the beam spot position from the BeamCondSvc, rather than the EventInfo.
As suggested on ATLPHYSVAL-619, the MuonCandidateTool will now retrieve the beam spot position from the BeamCondSvc, rather than the EventInfo.