Updated openstack/openstack
Project: openstack/python-swiftclient  e7dc8542575a613f80aeeeb1014269039940a7f0

Move test_shell.py under tests/unit/

Looks like test_shell.py got left behind when
the unit tests were relocated under tests/unit.
As a consequence they weren't included in tox
runs.

Change-Id: I93435e6141c5e3ad4a9403626f226d7c760cbd7c