Comment 3 for bug 1226003

I think it would be more consistent to not allow any of the "simple" behaviour if part of it doesn't work - so no SimpleDisassociate if SimpleAssociate doesn't work.

At some point we're going to want a proper non-simple 'Disassociate' that works with Neutron in order to allow people to remove an IP of their choice, rather than just the last one assigned (current 'simple' behaviour). But in the meantime, being consistent with either having all of the simple_ip_management behaviour or none of it, would make more sense to me.