model hooks cannot be overridden by subclasses

[Mark McClain]

The model hooks are registered as unbound methods which means that any subclass of a mixin will cause an unintended registration of the parent class hooks.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/41027

[Salvatore Orlando (salvatore-orlando)]

Thanks for filing this bug.
I had it on my todo list for a while.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/41027
Committed: http://github.com/openstack/neutron/commit/3f3346e598cc6418a5dae18776810f62d6f5375a
Submitter: Jenkins
Branch: master

commit 3f3346e598cc6418a5dae18776810f62d6f5375a
Author: Mark McClain <email address hidden>
Date: Fri Aug 9 00:53:33 2013 -0400

    allow subclasses to modify the parents model hooks

    fixes bug 1210387

    This change modifies the model hook processing to call the method on the
    instance if a hook is registered as a string. If the hook is a
    callable, then callable is called with the hook arguments.

    Change-Id: Id14ae89f3f12a500920d248226e0ecba8e35e74c