ENH: return a raw pointer instead of a smart pointer

Code/Simulation/otbSatelliteRSR.h

@@ -133,7 +133,7 @@ public:
   }
 
   /** get the solar irradiance */
-  SpectralResponsePointerType GetSolarIrradiance()
+  SpectralResponseType* GetSolarIrradiance()
   {
     return m_SolarIrradiance;
   }