Updated openstack/openstack
Project: openstack/nova  4a944ab86e147b1943ec3745cd0edc3e3d318efb
null
Sync the DB2 communication error code change from olso

Closes-Bug: #1244092

oslo patch set: 3acd57c2825a8bf6660c3124f12794414622eb26

Change-Id: I62e3a6d1137d53c4aa72b18db5bd9f7e41694436