Really fixed AttributeError this time.
Really fixed AttributeError this time.

Looks like the class' __del__ method was calling kill_session which
tried to lookup _options['server']. I was getting a KeyError now.

Final solution is similar to what I did in Flask-Celery-Helper.
Temporarily override the kill_session method until init_app() is called.

seedofjoy/Flask-JIRA-Helper,Robpol86/Flask-JIRA-Helper