Updated openstack/openstack
Project: openstack-dev/devstack  2efb9781c492a05962ea287f1addb3f791911fbd

Generate recent changes list from git log

The list of recent commits to the DevStack repo is now generated
by tools/build_docs.sh from the last 6 month of the git log.

Change-Id: Idefdb5d5188ab7e743af131e3d6cb132382d25d4