Fixes needed after RelVal input removal at CERN.

The fixes became necessary after CMSSW_6_2_0 RelVals have been removed from CERN, but CMSSW_6_2_0_pre8 RelVals have been kept with their broken RECO event content due to the GEN-SIM production.
PhysicsTools/PatAlgos/test/patTuple_addDecayInFlight_cfg.py has been forgotten to be migrated to unscheduled processing.