sync with latest PWGJE/EMCALJetTasks/macros/AddTaskEmcalJetSample.C; add signature ( AliEmcalJetTask* jetFinderTask,  Double_t jetareacut = 0.557, const char*  type = "EMCAL", Int_t leadhadtype = 0, const char*  taskname = "TaskEmcalJetCDF" )
cosmetic changes; add void ExecOnce()
cosmetic + reodering changes; + ExecOnce()