ENH : change the type of the option && enable modules with no outputimage to work proprely on Qgis

Utils/otbKmzExport.cxx

@@ -30,9 +30,9 @@ int KmzExport::Describe(ApplicationDescriptor* descriptor)
   descriptor->SetName("KmzExport");
   descriptor->SetDescription("Chain that Estimate a sensor model in order to export the input image to Google Earth understandable format Kmz");
   descriptor->AddInputImage(); 
-  descriptor->AddOption("OutputProductName", "Output Kmz product ", "kmz", 1, true,ApplicationDescriptor::String);
-  descriptor->AddOption("LogoImage", "Output Kmz product ", "lo", 1, false,ApplicationDescriptor::String);
-  descriptor->AddOption("LegendImage", "Output Kmz product ", "le", 1, false,ApplicationDescriptor::String);
+  descriptor->AddOption("OutputProductName", "Output Kmz product ", "kmz", 1, true,ApplicationDescriptor::FileName);
+  descriptor->AddOption("LogoImage", "Add a logo to the final Kmz ", "lo", 1, false,ApplicationDescriptor::FileName);
+  descriptor->AddOption("LegendImage", "Add a legend to the image exported ", "le", 1, false,ApplicationDescriptor::FileName);
  
   return EXIT_SUCCESS;
 }