Updated openstack/openstack
Project: openstack/python-openstackclient  d3bee31a9d1a2c89f2200a3546ffa2b568203f94

Acknowlege git.o.o as OpenStack's git server

OpenStack's cannonical git server is at git.o.o this patch
updates the index.rst to reflect that.

Change-Id: I54eeea7fab2e0f64ca9f23f7c328e2ff19721a41