Added detection for authentication failure in the response.
Added detection for authentication failure in the response.

coddingtonbear/jira,tsarnowski/jira-python,awurster/jira,m42e/jira,pycontribs/jira,akosiaris/jira,tsarnowski/jira-python,systemadev/jira-python,VikingDen/jira,m42e/jira,akosiaris/jira,jameskeane/jira-python,dwmarshall/pycontribs-jira,kinow/jira,rayyen/jira,dbaxa/jira,dwmarshall/pycontribs-jira,dbaxa/jira,kinow/jira,pycontribs/jira,coddingtonbear/jira,rayyen/jira,milo-minderbinder/jira,milo-minderbinder/jira,stevencarey/jira,VikingDen/jira,awurster/jira,stevencarey/jira,jameskeane/jira-python,systemadev/jira-python