erp5_catalog: [Migration] Exception while migrating catalog object

As now, we expect our catalog object to be erp5 catalog and not indexable,
so its important to not reindex or unindex the old object.

product/ERP5/Extensions/CheckPortalTypes.py

@@ -47,6 +47,10 @@ def changeObjectClass(self, object_id, new_class):
   new_obj = self._getOb(object_id, new_obj)
   if new_obj.isIndexable:
     new_obj.reindexObject()
+  elif new_obj.portal_type == 'Catalog':
+    # In case of 'Catalog' portal_type, we don't want unindexing or reindexing
+    # as we don't expect it to be indexable.
+    pass
   else:
     old_obj.unindexObject()
   return new_obj