QPR-13703 add mapping

Author: pcaspers

OREData/ored/configuration/yieldcurveconfig.hpp

@@ -63,7 +63,7 @@ class YieldCurveSegment : public XMLSerializable {
         NoPillar,
         MaturityDate,     // maps to QuantLib::Pillar::Maturity
         LastRelevantDate, // maps to QuantLib::Pillar::LastRelevantDate
-        StartDate,
+        StartDate,        // maps to QuantLib::Pillar::StartDate
         StartDateAndMaturityDate,
         StartDateAndLastRelevantDate
     };