Oslo project decided to move away from using oslo.* namespace for all their
libraries, so we should migrate to new import path.
This patch applies new paths for:
- oslo.config
- oslo.db
- oslo.messaging
- oslo.serialization
- oslo.utils
Hacking check will be added in Neutron once all *aas repositories are converted
to namespace-less imports.
Related-Bug: #1409733
Change-Id: If0dce29a0980206ace9866112be529436194d47e
fff9f37873