[Merge] lp:~mathieu-tl/software-properties/port-to-python3 into lp:software-properties

[Mathieu Trudel-Lapierre]

python3-software-properties Breaks/Replaces python-software-properties because add-apt-repository is carried by that package. I could re-add python-software-properties and keep shipping the python2 version of the modules, but parts of it are broken by the transition to python3 -- I did the work taking into account a move straight to python3, not looking back ;)

In light of this, I agree that most of the other code for python2 support (which I left in because it's easier to comparatively verify that things didn't get broken) could go if it's not needed to support python2 for software-properties. That would fix glib, queue and others.

As fpr the extra list() around .keys(); I think that's just caused by 2to3, I'll fix it now.
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https://code.launchpad.net/~mathieu-tl/software-properties/port-to-python3/+merge/111668
Your team Ubuntu Core Development Team is requested to review the proposed merge of lp:~mathieu-tl/software-properties/port-to-python3 into lp:software-properties.