username as default self-hosted field for current_user()

[adehad]

Replaces: #1165, aims to close #1164

FYI @hsekowski can you try installing this vs the release candidate and compare?

pip install jira==3.1.0rc1

vs

pip install git+https://github.com/pycontribs/jira.git@bugfix/create_project_user

[adehad]

I'll wait a bit longer to see if @hsekowski / @hsekowski-splunk can confirm this works for them before making the merge, thanks for the approval.

[petermcd]

I was just looking into this myself to see if I could help close it off and came to the same conclusion that it was due to the ID for the user being used rather than the username. I have a self hosted server instance on my local network and was able to prove this fix worked:

PRJ was created with a change I made during testing, PRK was created directly using this branch and the demo script in the originating ticket (with only username, password and project key changed)

[adehad]

(bump @hsekowski / @hsekowski-splunk)