allow ports to be created on networks that do not exist in nvp

[Aaron Rosen]

If a network exists in the quantum database but not in NVP we should allow someone to create a port on this network though set the status to error. The reason for allowing this is if one deletes a network from NVP and the dhcp agent goes to create it's dhcp port on this network currently an error will be raised to the agent and it will enter a constant cycle of resyncing.

Traceback (most recent call last):
  File "/opt/stack/quantum/quantum/plugins/nicira/QuantumPlugin.py", line 1190, in create_port
    port_create_func(context, port_data)
  File "/opt/stack/quantum/quantum/plugins/nicira/QuantumPlugin.py", line 374, in _nvp_create_port
    port_data)
  File "/opt/stack/quantum/quantum/plugins/nicira/QuantumPlugin.py", line 340, in _nvp_find_lswitch_for_port
    allow_extra_lswitches)
  File "/opt/stack/quantum/quantum/plugins/nicira/QuantumPlugin.py", line 738, in _handle_lswitch_selection
    lswitches = nvplib.get_lswitches(cluster, network.id)
  File "/opt/stack/quantum/quantum/plugins/nicira/nvplib.py", line 262, in get_lswitches
    cluster=cluster)
  File "/opt/stack/quantum/quantum/plugins/nicira/nvplib.py", line 208, in do_single_request
    raise exception.NotFound()
NotFound: An unknown exception occurred.
2013-05-12 17:02:20 ERROR [quantum.api.v2.resource] create failed
Traceback (most recent call last):
  File "/opt/stack/quantum/quantum/api/v2/resource.py", line 82, in resource
    result = method(request=request, **args)
  File "/opt/stack/quantum/quantum/api/v2/base.py", line 381, in create
    obj = obj_creator(request.context, **kwargs)
  File "/opt/stack/quantum/quantum/plugins/nicira/QuantumPlugin.py", line 1197, in create_port
    raise e
NotFound: An unknown exception occurred.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/28915

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/28915
Committed: http://github.com/openstack/quantum/commit/dbee58e7bb2ed1df6bb513247ec7ac07387ff5d1
Submitter: Jenkins
Branch: master

commit dbee58e7bb2ed1df6bb513247ec7ac07387ff5d1
Author: Aaron Rosen <email address hidden>
Date: Sun May 12 17:25:04 2013 -0700

    Allow ports to be created on networks that do not exist in NVP

    If a network exists in the quantum database but not in NVP we should allow
    someone to create a port on this network and set the status to ERROR. The
    reason for this is if one deletes a network from NVP and when the dhcp agent
    goes to create it's dhcp port on this network an error will be raised to the
    agent and it will enter a constant state of resyncing.

    This patch also adds a unit test for update_port() for the same situation.

    Fixes bug 1179327

    Change-Id: Ie77fc48d11644b820c0cc3b3fa341856e36f8511

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/grizzly
Review: https://review.openstack.org/29687