Updated openstack/openstack
Project: openstack/keystone  4b87994de50fb41551fab301e6c1f896f339288a
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Keystone team uses #openstack-keystone now

Keystone Team uses #openstack-keystone for IRC chatter now. Any cross
project topics still should be in #openstack-dev.

Change-Id: Ie4c6d6aee3bbdd8206fc0e5b00ecabfcaa265cb2