Pulling in changes to remove oslo namespace in _i18n module
and the list_opts for better configuration support with
oslo-config-generator in versionutils module
(Tip of oslo-incubator is change id - Id69701978d7a1701885bf17507a1f369e1035747)
Change-Id: Ibc793966fb442a870785186257ab44f1afc3e0b1