Updated openstack/openstack
Project: openstack/requirements  ac9e7c883760d621eb880169bf5088c895e68344

Move to newer version of python-swiftclient

The 2.0.x release of python-swiftclient includes SSL certificate
verification. This is desired for https://review.openstack.org/#/c/75927/

Change-Id: I3d6371a31c07c4e31da72edf9dd71537c8e58d23