[tests] Port unittest_cwctl to py3k On python 2, sys.stdout takes bytes-like objects whereas python 3's takes unicode-like objects and handles the encoding on its own.

usr/lib/python2*/*-packages/cubicweb/entities/
usr/lib/python2*/*-packages/cubicweb/ext/
usr/share/cubicweb/cubes/
usr/lib/python2*/*-packages/cubicweb/*.py