Updated openstack/openstack
Project: openstack/python-swiftclient  b9bd897639e742387ca901d0bd154363accdd7a4
null
Fix up StringIO use in tests for py3

Some spots in this file were already referencing six.StringIO, but
some were still using StringIO.StringIO, which does not work on
py3. This patch just makes them all use six.StringIO and removes the
now-unused (and wrong, on py3) import.

Change-Id: I3c7311c3983f4eb409eedb6f85ede6ffe4059e63