Implementation of Atlassian Jira as new issue tracker option

The implementation is based on the abilities of the ReST API v2, so everything above Jira 5.0 is supported. This implementation supports only the HTTP Basic auth, not the OAuth version. This would have lead to severe changes in the user management, too.

I encountered, that adding new field (I needed some new) has to be done in the parent IssueTracker class. Is there another option to do this? I would like to have the fields bound to the Jira Tracker implementation, but if I do so, the rendering fails with an error of not finding the fields.

Kind Regards,
Mario