Updated openstack/openstack
Project: openstack/oslo.db  44c9c574bda9ef25b19ab619e1ea66ef2b125101

Move files out of the namespace package

Move the public API out of oslo.db to oslo_db. Retain the ability to
import from the old namespace package for backwards compatibility for
this release cycle.

Blueprint: drop-namespace-packages

Change-Id: Ie96b482b9fbcb1d85203ad35bb65c1f43e912a44