Run database tests within long-lived schemas and transactionalized containers for oslo.db

This feature will overhaul the system by which oslo.db provides connectivity and fixture support for database-enabled tests. The new features will allow tests to be run against any number of database backends, to allow "opportunistic" backend URLs to be specified on a per-environment basis, as well as to allow an...

Make EngineFacade into a Facade for oslo.db

Propose a new system of SQLAlchemy session and engine connectivity and transactional scope within all projects that currently consume the EngineFacade / get_session() system.