Updated openstack/openstack
Project: openstack/python-swiftclient  d89e08f722f030925495a4180d2fe8422977841d

Capture test output better

This change adds some new classes to test.unit.utils which wrap up the
collection and mocking of the std err and std out.  This will make the
testing code easier to write and maintain.

Change-Id: I50ad2a736b2bb550ab83f6a43fb5a0fb5393573e