Updated openstack/openstack
Project: openstack/python-novaclient  d04818ef6ae8f324e0303c5a9428d99649c86b58

In Py3 decode the output of base64.decode

The return from a base64.encode in python 3 is bytes. Bytes cannot be
json.dumps() so when we base64 encode some data we need to convert it
to a string before passing it through to the request layer.

This isn't shown by unit tests because the fakeclient mocking layer
intercepts the request before it gets to the json encoding code.

Closes-Bug: #1323450
Change-Id: Ibbbb24f64c17069178e3bf0ee9998b806bc629ff