Updated openstack/openstack
Project: openstack/keystone  a725b67480bf912eda141612c37b0eae6ef87ff0

fixed typos found by RETF rules in RST files

rules are avaialble at https://en.wikipedia.org/wiki/Wikipedia:AutoWikiBrowser/Typos

Change-Id: Ia2b0e226d3f682fcba59907eadeb2a2c84972175