Graduate from Oslo Incubator to oslo.i18n library.
Cleanup of unused Oslo Incubator utils.
Added optional enable_lazy() usage.
Implements: blueprint graduate-oslo-i18n [1]
https://blueprints.launchpad.net/oslo-incubator/+spec/graduate-oslo-i18n
Change-Id: I9c8db9487b554b637a41620c858a7e7abf802879
