Updated openstack/openstack
Project: openstack/heat  5603b9f1283bd18516b555a8e95d70c9780c6af8

Remove unused generate_request_id

The heat.common.context module has an unused function to generate
the request id, this is now handled by the underlying oslo module
so can now be removed.

Change-Id: Iac5c2f8105dc88af5cae6937a68e1422694afe24