Fix broken tests with Python 2 after commit
We only use unicode strings on Python 2, so set str = unicode, so we can
use the str type in the rest of the code.
@@ -36,6 +36,7 @@ from websocket import ABNF, create_connection, WebSocketConnectionClosedExceptio
try:
basestring # Python 2
unicode
+ str = unicode
except NameError: # Python 3
basestring = unicode = str
