message: Set area for rho to area of background oatches
  Rho in calo trigger object matching with the median of 8x8
  patches, so area needs to be set to 8x8.
diff: @@ -173,7 +173,6 @@ void AliEmcalTriggerMakerKernel::ConfigureForPP2015()
  AddL1TriggerAlgorithm(64, 103, 1<<fTriggerBitConfig->GetGammaHighBit() | 1<<fTriggerBitConfig->GetGammaLowBit(), 2, 1);
  AddL1TriggerAlgorithm(0, 63, 1<<fTriggerBitConfig->GetJetHighBit() | 1<<fTriggerBitConfig->GetJetLowBit(), 16, 4);
  AddL1TriggerAlgorithm(64, 103, 1<<fTriggerBitConfig->GetJetHighBit() | 1<<fTriggerBitConfig->GetJetLowBit(), 8, 4);
  - SetOnlineBackgroundSubtraction(true); // Subtract background energy from online ADC values
  fConfigured = true;
  }
  @@ -553,7 +552,7 @@ void AliEmcalTriggerMakerKernel::CreateTriggerPatches(const AliVEvent *inputeven
  onlinebits &= bkgPatchMask;
  }
  if(fDoBackgroundSubtraction) {
  - double area = TMath::Power(static_cast<double>(patchit->GetPatchSize())/4., 2);
  + double area = TMath::Power(static_cast<double>(patchit->GetPatchSize())/8., 2);
  double rhoval = (patchit->GetRowStart() >= 64) ? fRhoValues[kIndRhoDCAL] : fRhoValues[kIndRhoEMCAL];
  AliDebugStream(1) << "Subtracting background for area " << area << ": " << rhoval << " -> " << (area * rhoval) << std::endl;
  patchit->SetADC(patchit->GetADC() - area * rhoval);
  