Improve logging error message for get() in rest_client.py

[solarjoe]

Please add some additional text to the this error message used during reponse handling.

atlassian-python-api/atlassian/rest_client.py

Line 284 in c9b4bb0

log.error(e)

The log shows something like
ERROR:atlassian.rest_client:Expecting value: line 1 column 1 (char 0)
which looks rather serious while it isn't.

Instead you could use something like

logging.error('JSON not found, returning text instead')

[isaac-philip]

Its a general exception caught which could be the reason why a general error is placed.

Depending on what lead you to that error we can segregate the error message better.

You could share your example that gave you this error.

Also your code PR if you know what could be a good solution, thanks.

[gonchik]

Hi!
Adjusted in to the dedicated method _response_handler, where you can add based on the proper error the text