ENH: implement GenerateData instead of an empty ThreadedGenerateData

Code/Projections/otbGCPsToRPCSensorModelImageFilter.h

@@ -175,7 +175,7 @@ protected:
    * GenerateOutputInformation() method */
   virtual void GenerateOutputInformation();
 
-  virtual void ThreadedGenerateData(const typename TImage::RegionType&, int) {}
+  virtual void GenerateData();
 
 private:
   GCPsToRPCSensorModelImageFilter (const Self &);   // purposely not implemented

Code/Projections/otbGCPsToRPCSensorModelImageFilter.txx

@@ -370,6 +370,14 @@ GCPsToRPCSensorModelImageFilter<TImage>
   itk::EncapsulateMetaData<ImageKeywordlist>(dict, MetaDataKey::OSSIMKeywordlistKey, otb_kwl);
 }
 
+template <class TImage>
+void
+GCPsToRPCSensorModelImageFilter<TImage>
+::GenerateData()
+{
+  Superclass::GenerateData();
+}
+
 template <class TImage>
 void
 GCPsToRPCSensorModelImageFilter<TImage>