Abort uploader if nextVisit message fails.

Previously, nextVisit post could fail silently, and the only indication
would be the lack of an incoming message in the dev service.

Author: kfindeisen

python/tester/utils.py

@@ -359,6 +359,7 @@ def send_next_visit(url, group, visit_infos):
         value_schema_level = dict(value_schema_id=SCHEMA_ID, records=[records_level])
 
         r = requests.post(url, data=json.dumps(value_schema_level), headers=header)
+        r.raise_for_status()
         _log.debug(f"Kafka proxy post status code {r.status_code} and response {r.content}")