switch from hardware object to string

and replace mac address to disk serial number
for more predictable hash key

Azaion.Inference/test/test_download_large_file.py

@@ -202,7 +202,7 @@ class Api:
         payload = json.dumps(
             {
                 "password": self.credentials.password,
-                "hardware": hardware.to_json_object(),
+                "hardware": hardware,
                 "fileName": filename
             }, indent=4)
         response = requests.post(url, data=payload, headers=headers, stream=True, timeout=20)