Do not monkey-patch AssociationProxy
Do not monkey-patch AssociationProxy

The change was applied upstream some time ago.

Change-Id: Id4597be7998cbe083c89f9d63c306783defe9c78
Reviewed-by: Dave Reeve <6a84ee3ae0690d4584b99406fb3076392171f50e@morganstanley.com>

quattor/aquilon,guillaume-philippon/aquilon,quattor/aquilon,guillaume-philippon/aquilon,guillaume-philippon/aquilon,quattor/aquilon