Comment 0 for bug 1337768

In v2 the set_user_password controller method call update_user, which mean that setting only 'identity:change_password' to 'rule:owner' will not works unless 'identity:update_user' is also changed to 'rule:owner' or similar.

https://github.com/openstack/keystone/blob/stable/icehouse/keystone/identity/controllers.py#L237-239