Handle expected 204

In case of uploading the problemset we expect a HTTP204 which is
not valid JSON and would throw an error by design.

Author: vmcj

misc-tools/dj_utils.py

@@ -147,6 +147,8 @@ def upload_file(name: str, apifilename: str, file: str, data: dict = {}):
 
         result = parse_api_response(name, response)
 
+    if response.status_code == 204:
+        return result
     try:
         result = json.loads(result)
     except json.decoder.JSONDecodeError as e: