Updated openstack/openstack
Project: openstack/requirements  23b0eb978009a466a51212eb01857fc0ad95cb52

Update oslo.i18n to latest version

Fixes include:
08bee34 Imported Translations from Transifex
aa251be Updated from global requirements
106387b Imported Translations from Transifex
688076e Document how to add import exceptions
a4fc251 Remove mention of Message objects from public docs

Change-Id: If8343d7c506bdd45c5e63fde852c2801e5cff1b0