OM46, del 1: Support batch_complete endpoint from setra

setra_client/client.py

@@ -221,15 +221,12 @@ class SetraClient(object):
                              return_response=return_response)
         return response
 
-    def get_batch_complete(self, batch_id: int = None):
+    def get_batch_complete(self, batch_id: str):
         """
-        GETs one or all batches from SETRA
+        GETs complete batch (with vouchers and transactions)
+        from SETRA
         """
-        if batch_id is not None:
-            batch_id = str(batch_id)
-
         url = self.urls.batch_complete(batch_id)
-
         response = self.get(url)
         return response.json()