config-neutron: tempest port-create on network without subnet fails

[Hampapur Ajay]

Observed following traceback when
tempest.api.network.test_networks.BulkNetworkOpsTestJSON.test_bulk_create_delete_port
is run. This is due to port created on network that doesn't have a subnet. This affects only master branch.

The above is a description of an error in a Python program. Here is
the original traceback:

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_interface.py", line 385, in plugin_create_port
    net_info = cfgdb.port_create(context, port['resource'])
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_db.py", line 3273, in port_create
    for ipam_ref in ipam_refs:
TypeError: 'NoneType' object is not iterable

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/bottle.py", line 764, in _handle
    return route.call(**args)
  File "/usr/lib/python2.7/dist-packages/bottle.py", line 1625, in wrapper
    rv = callback(*a, **ka)
  File "/usr/lib/python2.7/dist-packages/bottle.py", line 1575, in wrapper
    rv = callback(*a, **ka)
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_interface.py", line 460, in plugin_http_post_port
    return self.plugin_create_port(context, port)
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_interface.py", line 389, in plugin_create_port
    raise e
TypeError: 'NoneType' object is not iterable

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/4133
Committed: http://github.org/Juniper/contrail-controller/commit/43e34af7eb0eca5bf613190e16dcca8fb47bfc05
Submitter: Zuul
Branch: master

commit 43e34af7eb0eca5bf613190e16dcca8fb47bfc05
Author: Hampapur Ajay <email address hidden>
Date: Mon Oct 27 12:23:41 2014 -0700

If no subnet on network, don't try to iterate on None

Closes-Bug: #1386382

Change-Id: I96f765195ff431d6a1f32235a98b005dce095009