[python3] setup.py: use_2to3
[python3] setup.py: use_2to3

--HG--
extra : transplant_source : %28%1Fj%86%2C%FC%FEO%95R%0Ev%BE%0A%21%88Le%AA%10

userzimmermann/robotframework,userzimmermann/robotframework,userzimmermann/robotframework,userzimmermann/robotframework,userzimmermann/robotframework