For rootcling do not RegisterModule but parse what we need (SPI-546).

Still selecting
```
Selected class -> std::vector<ROOT::TSchemaHelper, std::allocator<ROOT::TSchemaHelper> > for ROOT: vector<ROOT::TSchemaHelper>
Selected class -> std::vector<TVirtualArray *, std::allocator<TVirtualArray *> > for ROOT: vector<TVirtualArray*>
```