[Development] Closing issues automatically with new keyword

[Frederik Gladhorn]

Hi all,

I've spend a bit of time writing a script that monitors gerrit and the git 
repositories to update JIRA statuses. It's not quite done yet, but getting 
there.
Basically it should be able to set the fixed version and close tasks 
automatically.

Assuming there is no major protest, I'll use "Fixes: QTBUG-123" as the keyword 
to trigger this.

The plan is to update the fix versions and close the task as done when a line 
in the commit message starts with "Fixes:".
If the issue is already closed (e.g. cherry-pick) it can add an additional fix 
version (e.g. 5.9.7).

Note: Task-number will be used as before as "this is related to the issue in 
some way".

Cheers,
Frederik