error in client.py with the SP40 version

[dnicolleau]

in the SP40 version, the line 5902 seems to make no sense and generates a runtime error :

    request_json = {
        "clientProperties": {},
        "association": {
            "entity": [
                {
                    "clientName": self.client_name
                }
            ]
        }
    }

    request_json['clientProperties'].update(properties_dict)
    request_json['clientProperties']['clientProps'].pop("CVS3BucketName")    <<<< this one
    self._process_update_request(request_json)