message: Improve debug information for physics selection
  We clearly report the problematic key if an invalid key is passed.
diff: @@ -77,8 +77,15 @@ const std::map <std::string, AliVEvent::EOfflineTriggerTypes> AliEmcalContainerU
  UInt_t AliEmcalContainerUtils::DeterminePhysicsSelectionFromYAML(const std::vector<std::string> & selections)
  {
  UInt_t physicsSelection = 0;
  - for (auto sel : selections) {
  - physicsSelection |= fgkPhysicsSelectionMap.at(sel);
  + for (auto selection : selections) {
  + auto sel = fgkPhysicsSelectionMap.find(selection);
  + AliDebugGeneralStream("AliEmcalContainerUtils", 3) << "Adding physics selection: " << selection << "\n";
  + if (sel != fgkPhysicsSelectionMap.end()) {
  + physicsSelection |= sel->second;
  + }
  + else {
  + AliFatalGeneralF("AliEmcalContainerUtils", "Could not find physics selection with key \"%s\"", selection.c_str());
  + }
  }
  return physicsSelection;
  }
  