Sync the DB2 communication error code change from olso

Closes-Bug: #1244092

oslo patch set: 3acd57c2825a8bf6660c3124f12794414622eb26

Change-Id: I62e3a6d1137d53c4aa72b18db5bd9f7e41694436
Merge "Sync the DB2 communication error code change from olso"