modified fuzzer

    test_data = [...some list of dictionaries with inputs to use and the expected exception ...]

    def test_create_servers_negative_input(self):
        for data in test_data:
            yield self.create_delete_server, test_data, test_data['exception']
    
    def create_delete_server(self, data, expected_exception):
    try:    
        self.servers_client.create_server(data)
    except expected_exception:
        pass
    else:
        fail