Updated openstack/openstack
Project: openstack/sahara  18a741c2abe214600094fbc401b648b80ba22823

Remove docutils pin

This was added to work around bug 1091333.  A new sphinx has been
released and so this is no longer necessary.

Change-Id: I6ea61a3cc441dd1ca2ced7e2fd837a55b917f76d