Session persistence cannot be reset for a VIP.

[Roman Prykhodchenko]

There's no way to reset session persisrence for a VIP after it has been configured. Even after sending an empty dictionary or a null object through the REST API session persistence is still configured.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/20725

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/20725
Committed: http://github.com/openstack/quantum/commit/35cb218adb9a370fa1013b6ef2593e9ef081461e
Submitter: Jenkins
Branch: master

commit 35cb218adb9a370fa1013b6ef2593e9ef081461e
Author: Roman Prykhodchenko <email address hidden>
Date: Tue Jan 29 20:33:17 2013 +0200

    Resetting session persisnence for a VIP.

    This change allows to reset session persistence, if it
    was configured for a VIP. It's possible by passing None
    value for session persistence through the REST API.

    Change-Id: I8690850d0589065502a8eb774d51fe40851624f8
    Fixes: bug #1109101