nvp plugin rxtx_factor readonly update port

[Aaron Rosen]

The following change done in nova https://github.com/openstack/nova/commit/7de916f57f067c09d1a47024c3e6f4e471f725c4 started passing in rxtx_factor on update port rather just on create_port which we only wanted. Therefore when booting a vm and specifying --nic port-id it causes the following error in neutron to be raised and the vm fails to boot.

2013-07-17 14:47:57.909 13620 TRACE neutron.api.v2.resource Traceback (most recent call last):
2013-07-17 14:47:57.909 13620 TRACE neutron.api.v2.resource File "/opt/stack/neutron/neutron/api/v2/resource.py", line 82, in resource
2013-07-17 14:47:57.909 13620 TRACE neutron.api.v2.resource result = method(request=request, **args)
2013-07-17 14:47:57.909 13620 TRACE neutron.api.v2.resource File "/opt/stack/neutron/neutron/api/v2/base.py", line 457, in update
2013-07-17 14:47:57.909 13620 TRACE neutron.api.v2.resource allow_bulk=self._allow_bulk)
2013-07-17 14:47:57.909 13620 TRACE neutron.api.v2.resource File "/opt/stack/neutron/neutron/api/v2/base.py", line 572, in prepare_request_body
2013-07-17 14:47:57.909 13620 TRACE neutron.api.v2.resource raise webob.exc.HTTPBadRequest(msg)
2013-07-17 14:47:57.909 13620 TRACE neutron.api.v2.resource HTTPBadRequest: Cannot update read-only attribute rxtx_factor
2013-07-17 14:47:57.909 13620 TRACE neutron.api.v2.resource

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/37582

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/37582
Committed: http://github.com/openstack/neutron/commit/7b69d98e196a98295048d311786b9f23586dc4fd
Submitter: Jenkins
Branch: master

commit 7b69d98e196a98295048d311786b9f23586dc4fd
Author: Aaron Rosen <email address hidden>
Date: Wed Jul 17 14:56:16 2013 -0700

    nvp plugin rxtx_factor readonly update port

    The following change done in nova 7de916 started passing in the
    rxtx_factor on update port rather than just on create_port which
    is what we only originally supported. Therefore currently when
    booting a vm and specifying --nic port-id it will fail to boot with:
    Cannot update read-only attribute rxtx_factor. This patch is a work
    around to allow the rxtx_factor value to be passed in on update port even
    though we ignore the value. Later we'll implement updating rxtx_factor on
    ports but this is a good work around for now.

    Fixes bug: 1202406

    Change-Id: Iedd488b7bdc9b1a1317000d249f03b0eafbea419