Update oslo

This updates to:

commit b3e5166e3f47148856d898c4653b0c089c2315f5
Merge: 0002ffa 39e1c5c
Author: Jenkins <jenkins@review.openstack.org>
Date:   Thu Jan 30 10:18:54 2014 +0000

    Merge "Move db tests base.py to common code"

Change-Id: Iaa76b1165e195f0c3874bc5c8bcbc9ecbb6ca5d7