Address Python 3 string encoding issues in test_views.py
Address Python 3 string encoding issues in test_views.py

This is the usual stuff apart from the changes to webob.Response.
It looks like webob 1.7 introduced a backwards-incompatible
change for JSON responses: https://docs.pylonsproject.org/projects/webob/en/1.7-branch/whatsnew-1.7.html#backwards-incompatibility

edx/xblock-sdk,edx/xblock-sdk,stvstnfrd/xblock-sdk,stvstnfrd/xblock-sdk,stvstnfrd/xblock-sdk,edx/xblock-sdk