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There are a number of patches up for review that make various changes to 
use "six" apis instead of Python 2 constructs. While I understand the 
desire to get a head start on getting Tempest to run in Python 3, I'm 
not sure it makes sense to do this work piecemeal until we are near 
ready to introduce a py3 gate job. Many contributors will not be aware 
of what all the differences are and py2-isms will creep back in 
resulting in more overall time spent making these changes and reviewing. 
Also, the core review team is busy trying to do stuff important to the 
icehouse release which is barely more than 5 weeks away. IMO we should 
hold off on various kinds of "cleanup" patches for now.

  -David