Fixed tests so Python 3 compatible.
Fixed tests so Python 3 compatible.

phobson/seaborn,mwaskom/seaborn,olgabot/seaborn,drewokane/seaborn,anntzer/seaborn,arokem/seaborn,petebachant/seaborn,oesteban/seaborn,sauliusl/seaborn,lukauskas/seaborn,JWarmenhoven/seaborn,jat255/seaborn,anntzer/seaborn,lukauskas/seaborn,mwaskom/seaborn,phobson/seaborn,arokem/seaborn