message: EMCal CorrFW: Add additional non-linearity enums
  Each enum value needs to be explicitly added to the string map to allow
  the value to be set from the YAML config. Adds `kBeamTestCorrectedv4` and
  some PCM parameterizations.
diff: @@ -28,7 +28,11 @@ const std::map <std::string, AliEMCALRecoUtils::NonlinearityFunctions> AliEmcalC
  { "kPi0MCv5", AliEMCALRecoUtils::kPi0MCv5 },
  { "kSDMv6", AliEMCALRecoUtils::kSDMv6 },
  { "kPi0MCv6", AliEMCALRecoUtils::kPi0MCv6 },
  - { "kBeamTestCorrectedv3", AliEMCALRecoUtils::kBeamTestCorrectedv3 }
  + { "kBeamTestCorrectedv3", AliEMCALRecoUtils::kBeamTestCorrectedv3 },
  + { "kPCMv1", AliEMCALRecoUtils::kPCMv1 },
  + { "kPCMplusBTCv1", AliEMCALRecoUtils::kPCMplusBTCv1 },
  + { "kPCMsysv1", AliEMCALRecoUtils::kPCMsysv1 },
  + { "kBeamTestCorrectedv4", AliEMCALRecoUtils::kBeamTestCorrectedv4 }
  };
  /**
  