Option auth_uri from group keystone_authtoken is deprecated[1].
Use option www_authenticate_uri from group keystone_authtoken.
[1]https://review.openstack.org/#/c/508522/
Change-Id: I43bbc8b8c986e54a9a0829a0631d78d4077306f8
This patch adds support for retrieving the encryption root secret from
an external key management system. In practice, this is currently
limited to Barbican.
Change-Id: I1700e997f4ae6fa1a7e68be6b97539a24046e80b