Updated openstack/openstack
Project: openstack/python-novaclient  5a3ca61cfdfb4aca20cdc0f571ede1ba7f6f7e11

Sync Oslo's apiclient

Oslo's version of apiclient fixes a bug where if `human_id` is `None` it
causes `novaclient` to crash, so lets sync it over to fix that bug.

Change-Id: I53f174a1d3356c4038dcbdf88f4f9c4ea179418c
References-Bug: 1288397