Updated openstack/openstack
Project: openstack/requirements  34dad4e617d58771ad3cf037deaad9431ff14e72

Require Jinja2>=2.6

The Designate project requires Jinja2 functionality available only in
version 2.6+.

Additionally, add a comment specifying the Jinja2 license (BSD 3 Clause)

Partial-Bug: 1375613
Change-Id: I4cf8a38106385990b278475d6efc43245461ba6e