Merge branch 'attrList.TrigT1CaloCalibUtils-20200229' into 'master'

TrigT1CaloCalibUtils: Avoid copying AttributeList.

See merge request atlas/athena!30747

Trigger/TrigT1/TrigT1CaloCalibUtils/src/L1CaloDumpRampData.cxx

@@ -106,7 +106,7 @@ StatusCode L1CaloDumpRampData::finalize()
     // overlay the fit function
     auto attrListIt = energyScanResults->chanAttrListPair(coolId);
     if(attrListIt != energyScanResults->end()) {
-      auto attrList = attrListIt->second;
+      const auto& attrList = attrListIt->second;
       double slope = attrList["Slope"].data<double>();
       double offset = attrList["Offset"].data<double>();
       double chi2 = attrList["Chi2"].data<double>();