Follow new infra setup for translations, see spec
http://specs.openstack.org/openstack-infra/infra-specs/specs/translation_setup.html
for full details.
This basically renames
oslo.utils/locale/oslo.utils.pot to
oslo_utils/locale/oslo_utils.pot. For this we need to update
setup.cfg.
Update also domain name in _i18n.py.
Change-Id: Ie4837571b06dd08da9676bf6a3f6eca932559fb1
21fbb7e829