AttributeError: 'module' object has no attribute 'VIF_TYPE_VROUTER'

Fix:
===
a)
Open contrail_plugin.py
#vim neutron/plugins/opencontrail/contrail_plugin.py



b)
Add following statements at class level in class NeutronPluginContrailCoreV2
#patch VIF_TYPES
portbindings.__dict__['VIF_TYPE_VROUTER'] = 'vrouter'
portbindings.VIF_TYPES.append(portbindings.VIF_TYPE_VROUTER)

Example:
-----------------  
class  NeutronPluginContrailCoreV2(neutron_plugin_base_v2.NeutronPluginBaseV2,
                                      securitygroup.SecurityGroupPluginBase,
                                      portbindings_base.PortBindingBaseMixin,
                                      external_net.External_net):
        # patch VIF_TYPES
        portbindings.__dict__['VIF_TYPE_VROUTER'] = 'vrouter'
        portbindings.VIF_TYPES.append(portbindings.VIF_TYPE_VROUTER)

ERROR:
======
#sudo python neutron-server --config-file /etc/neutron/neutron.conf --log-file /var/log/neutron/server.log --config-file /etc/neutron/plugins/opencontrail/ContrailPlugin.ini

/usr/lib/python2.7/dist-packages/eventlet/hubs/__init__.py:8: UserWarning: Module neutron was already imported from /home/saju/neutron/neutron/__init__.pyc, but /usr/lib/python2.7/dist-packages is being added to sys.path
  import pkg_resources
loc:===> /home/saju/neutron/neutron/__init__.pyc
2014-11-23 11:02:30.650    ERROR [neutron.service] Unrecoverable error: please check log for details.
Traceback (most recent call last):
  File "/home/saju/neutron/neutron/service.py", line 105, in serve_wsgi
    service.start()
  File "/home/saju/neutron/neutron/service.py", line 74, in start
    self.wsgi_app = _run_wsgi(self.app_name)
  File "/home/saju/neutron/neutron/service.py", line 173, in _run_wsgi
    app = config.load_paste_app(app_name)
  File "/home/saju/neutron/neutron/common/config.py", line 170, in load_paste_app
    app = deploy.loadapp("config:%s" % config_path, name=app_name)
  File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 247, in loadapp
    return loadobj(APP, uri, name=name, **kw)
  File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 272, in loadobj
    return context.create()
  File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 710, in create
    return self.object_type.invoke(self)
  File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 144, in invoke
    **context.local_conf)
  File "/usr/lib/python2.7/dist-packages/paste/deploy/util.py", line 56, in fix_call
    val = callable(*args, **kw)
  File "/usr/lib/python2.7/dist-packages/paste/urlmap.py", line 25, in urlmap_factory
    app = loader.get_app(app_name, global_conf=global_conf)
  File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 350, in get_app
    name=name, global_conf=global_conf).create()
  File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 710, in create
    return self.object_type.invoke(self)
  File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 144, in invoke
    **context.local_conf)
  File "/usr/lib/python2.7/dist-packages/paste/deploy/util.py", line 56, in fix_call
    val = callable(*args, **kw)
  File "/home/saju/neutron/neutron/auth.py", line 69, in pipeline_factory
    app = loader.get_app(pipeline[-1])
  File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 350, in get_app
    name=name, global_conf=global_conf).create()
  File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 710, in create
    return self.object_type.invoke(self)
  File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 146, in invoke
    return fix_call(context.object, context.global_conf, **context.local_conf)
  File "/usr/lib/python2.7/dist-packages/paste/deploy/util.py", line 56, in fix_call
    val = callable(*args, **kw)
  File "/home/saju/neutron/neutron/api/v2/router.py", line 71, in factory
    return cls(**local_config)
  File "/home/saju/neutron/neutron/api/v2/router.py", line 75, in __init__
    plugin = manager.NeutronManager.get_plugin()
  File "/home/saju/neutron/neutron/manager.py", line 222, in get_plugin
    return weakref.proxy(cls.get_instance().plugin)
  File "/home/saju/neutron/neutron/manager.py", line 216, in get_instance
    cls._create_instance()
  File "/home/saju/neutron/neutron/openstack/common/lockutils.py", line 249, in inner
    return f(*args, **kwargs)
  File "/home/saju/neutron/neutron/manager.py", line 202, in _create_instance
    cls._instance = cls()
  File "/home/saju/neutron/neutron/manager.py", line 114, in __init__
    plugin_provider)
  File "/home/saju/neutron/neutron/manager.py", line 142, in _get_plugin_instance
    return plugin_class()
  File "/home/saju/neutron/neutron/plugins/opencontrail/contrail_plugin.py", line 72, in __init__
    self.base_binding_dict = self._get_base_binding_dict()
  File "/home/saju/neutron/neutron/plugins/opencontrail/contrail_plugin.py", line 78, in _get_base_binding_dict
    portbindings.VIF_TYPE: portbindings.VIF_TYPE_VROUTER,
AttributeError: 'module' object has no attribute 'VIF_TYPE_VROUTER'
2014-11-23 11:02:30.657 CRITICAL [neutron] 'module' object has no attribute 'VIF_TYPE_VROUTER'