Ensure the proper encoding for the authentication header response

issue6628
review36441002

trytond/protocols/wrappers.py

@@ -148,7 +148,7 @@ def user_application(name, json=True):
             pool = Pool()
             UserApplication = pool.get('res.user.application')
 
-            authorization = request.headers['Authorization']
+            authorization = wsgi_to_bytes(request.headers['Authorization'])
             try:
                 auth_type, auth_info = authorization.split(None, 1)
                 auth_type = auth_type.lower()