Improve logging on returning errors to uploaders

[Athanasius]

An EDMC 5.2.0 user is seeing.

2021-10-26 20:28:35.675 - WARNING - 8464:8368:8368 plugins.eddn.http_error_to_log:339: Unknown status code from EDDN: None -- <Response [400]>
Exception in Tkinter callback Traceback (most recent call last):
File "C:\Program Files (x86)\EDMarketConnector\plugins\eddn.py", line 289, in sendreplay self.send(cmdr, msg) File "C:\Program Files (x86)\EDMarketConnector\plugins\eddn.py", line 238, in send r.raise_for_status()
File "requests\models.pyc", line 953, in raise_for_status requests.exceptions.HTTPError: 400 Client Error: Bad Request for url: https://eddn.edcd.io:4430/upload/
During handling of the above exception, another exception occurred:
Traceback (most recent call last): File "tkinter\__init__.pyc", line 1892, in __call__
File "tkinter\__init__.pyc", line 814, in callit
File "C:\Program Files (x86)\EDMarketConnector\plugins\eddn.py", line 307, in sendreplay
status['text'] = self.http_error_to_log(e)
File "C:\Program Files (x86)\EDMarketConnector\plugins\eddn.py", line 341, in http_error_to_log
return _('EDDN Error: Returned {STATUS} status code').format(status_code) KeyError: 'STATUS'

Yes, that log is a little scrambled on line breaks, I did my best to unscramble it. Ref: https://discord.com/channels/164411426939600896/205369618284544000/902622733991542804

This will relate to https://github.com/EDCD/EDDN/blob/master/src/eddn/Gateway.py#L126