IBM_SCE driver auth issue under Python 3

Confirmed working under python2.7. Under Python3 base64 auth not working, "from libcloud.utils.py3 import b" seems to be affecting the result. See attachment for session log (sanitised user/pass).

Debug curl string looks suspicious:
-H 'Authorization: Basic b'"'"'dXNlcm5hbWU6cGFzc3dvcmQ='"'"''