Edge LbaaS/Firewall should return router_id when getting vip/firewall

[Bo Lin]

In order to support NVP advanced lbaas/firewall UI, it is needed to return the router_id attribute when getting vip/firewall.
Also, it is needed to refactor duplicate code for delete_vip/delete_pool/delete_health_monitor

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/48568

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/59129

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/59129
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=1eb8fa563d13e46f0a7011143f65e371ae091684
Submitter: Jenkins
Branch: master

commit 1eb8fa563d13e46f0a7011143f65e371ae091684
Author: berlin <email address hidden>
Date: Fri Sep 27 11:09:36 2013 +0800

    add router_id to response for CRU on fw/vip objs

    Closes-Bug: #1231770
    Change-Id: I3763d2af855d2ad28ff89b528264ba981e71c08a