oslo.i18n: Move to singlespec
oslo.i18n: Move to singlespec

Depends-On: I9e3c8a9700a32ecb1c49f62ac3b8467198c51b2a
Change-Id: Ica190944b14c5ab05538c294058cdcd76ee77eef

openstack/rpm-packaging,openstack/rpm-packaging