Added the dragon model (already in external data store)

This should add it to the branch, the scene topic already pushed it
into the external data store.

Change-Id: Ic9888225c77459ebb0780eaa24d13b33896a9a65

Rendering/OpenGL2/Testing/Cxx/TestVBOPLYMapper.cxx

@@ -46,7 +46,7 @@ int TestVBOPLYMapper(int argc, char *argv[])
 
 
   const char* fileName = vtkTestUtilities::ExpandDataFileName(argc, argv,
-                                                              "Data/bunny.ply");
+                                                              "Data/dragon.ply");
 
   vtkNew<vtkPLYReader> reader;
   reader->SetFileName(fileName);

Testing/Data/dragon.ply.md5

+b7d4fa1943ca47ef537e6847886e3935