This patch focuses on providing the shards controller for sqlalchemy.
As a bonus, a decorator is added that flags all methods that handles
all methods that raise a connection error.
The sqlalchemy driver passes all unit tests for the shards
controller. The initial suite is running on the sqlite engine.
A few general fixes have been applied:
- shards listing unit test now uses characters for names rather than
numbers as strings to avoid sorting variations between storage
engines
- cache.get_cache no longer takes a configOpts object
Change-Id: I7400884244be94f7600a5fb489b38c7058d36b31
Partially-Implements: blueprint: sql-storage-driver
63483b790f