Raise error instead of marking export as failure

src/app.py

@@ -1897,6 +1897,7 @@ def upload_dataset(self, dump_config_to_s3=False):
                 dataset_info["hdx_upload"] = "SUCCESS"
             except Exception as ex:
                 logging.error(ex)
+                raise ex
                 dataset_info["hdx_upload"] = "FAILED"
 
             dataset_info["name"] = self.dataset["name"]