Updated openstack/openstack
Project: openstack/horizon  61e057172c3b38b9bb62c1b7b412c40dcedf2cc3
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RST typo for tutorial documentation

Change-Id: Iefde2978d37363993fa1e10001510aca1a73e9c1
Signed-off-by: Paul Belanger <paul.belanger@polybeacon.com>