Updated openstack/openstack
Project: openstack/keystone  0473e5ab75ece62df8b7bb429c9e75db34ce71f6
null
Add missing import, remove trailing ":" in middleware example

Minor fixes to the external authentication example given in the
documentation.

Change-Id: I2bef7da8bf8278349fec80a513095637ea49f19a
Closes-Bug: #1308634
Co-Authored-By: Florent Flament <florent.flament-ext@cloudwatt.com>