Duplicated debug message

[jnogol]

Before calling the parser, the JSON received is printed if log level is DEBUG:

logger.debug('Data received: %s', post_data)
message = compose(self.template_path, parse(post_data))

and is printed too the very moment we call the parser:

def parse(json_str):
    logger.debug('received: %s', json_str)
[...]

So second time is not necessary.