correct the bibliographyform problem

TODO: make it in a clean method

Former-commit-id: aea5c2662300200d87724281e556fc10ed35f3ed

ippisite/ippidb/views.py

@@ -99,6 +99,8 @@ class IppiWizard(NamedUrlSessionWizardView):
         data = super(IppiWizard, self).process_step(form).copy()
         if self.steps.current == 'IdForm':
             form.instance.autofill()
+            # reset data for the next form
+            del self.storage.data['step_data']['BibliographyForm']    
         if self.steps.current in ['IdForm', 'Bibliography']:
             form.instance.save()
             data['pk'] = form.instance.id