This was simply the result of:
find -type f | xargs sed -i 's/keystoneclient/keystoneauth/g'
find -type f | xargs sed -i 's/python-keystoneauth/keystoneauth/g'
in the docs directory to fix the build failure.
Will look at a doc rewrite soon.
Change-Id: I05d4be12f31ea47e917dc79e50d17b174bf89938