Updated openstack/openstack
Project: openstack/keystonemiddleware  f21ccea42cf2e4c2dd4aff63f6feca72d81c4e18

Convert authentication into a plugin

Extract all the information that is related to auth and make it into a
keystoneclient auth plugin. This will make it easier later to substitute
this auth plugin for another auth plugin.

Blueprint: pluggable-auth
Change-Id: Ibf9bc1dbf26f396bac09a96398a6467afc30f529