parse correctly activity classes from MDDR SDF files

the list of activity classes is sep. by line breaks, NOT commas


Former-commit-id: 1cd78ad8f3c3215e1179bed6b6d3c31f34f92ed4

ippisite/ippidb/management/commands/import_v1_data.py

@@ -538,7 +538,7 @@ select distinct protein.NumUniprot, domain.PfamNumAccession  , complexe.NbCopy,
                         m.dvpmt_phase = item.data['PHASE']
                         m.db_import_date = timezone.now()
                         m.save()
-                        for activity_class_name in item.data['ACTIV_CLASS'].split(','):
+                        for activity_class_name in item.data['ACTIV_CLASS'].split('\n'):
                             activity_class, created = MDDRActivityClass.objects.get_or_create(
                                 name=activity_class_name)
                             m.activity_classes.add(activity_class)