vcenter-as-compute: 2706- vm spawn on vcenter compute using openstack failing

[shajuvk]

vm lunch on esxi compute is failing with the below exception. code taking nova as default hypervisor even if we specify esxi hypervisor type.

===============

2016-01-29 15:04:04.944 ERROR [neutron.api.v2.resource] create failed
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/neutron/api/v2/resource.py", line 83, in resource
    result = method(request=request, **args)
  File "/usr/lib/python2.7/dist-packages/neutron/api/v2/base.py", line 461, in create
    obj = obj_creator(request.context, **kwargs)
  File "/usr/lib/python2.7/dist-packages/neutron_plugin_contrail/plugins/opencontrail/contrail_plugin_base.py", line 401, in create_port
    dpdk_enabled = self._is_dpdk_enabled(context, port['port'])
  File "/usr/lib/python2.7/dist-packages/neutron_plugin_contrail/plugins/opencontrail/contrail_plugin_base.py", line 393, in _is_dpdk_enabled
    port['binding:host_id']])
  File "/usr/lib/python2.7/dist-packages/neutron_plugin_contrail/plugins/opencontrail/contrail_plugin_base.py", line 355, in _get_vrouter_config
    return self._get_resource('virtual_router', context, id, fields)
  File "/usr/lib/python2.7/dist-packages/neutron_plugin_contrail/plugins/opencontrail/contrail_plugin.py", line 270, in _get_resource
    fields=fields, obj_name=res_type)
  File "/usr/lib/python2.7/dist-packages/neutron_plugin_contrail/plugins/opencontrail/contrail_plugin.py", line 236, in _transform_response
    plugin_base._raise_contrail_error(info, obj_name)
  File "/usr/lib/python2.7/dist-packages/neutron_plugin_contrail/plugins/opencontrail/contrail_plugin_base.py", line 103, in _raise_contrail_error
    raise exc.NeutronException(**info)
NeutronException: An unknown exception occurred.

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/16855
Submitter: Sachchidanand Vaidya (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/16855
Committed: http://github.org/Juniper/contrail-neutron-plugin/commit/8905e35b4125743fe2f54f90afd9bc3c306c1f9b
Submitter: Zuul
Branch: master

commit 8905e35b4125743fe2f54f90afd9bc3c306c1f9b
Author: Sachchidanand Vaidya <email address hidden>
Date: Wed Feb 3 17:11:47 2016 -0800

In vcenter-as-compute case, we are seeing neutron-server exception
during vm creation (port creation). In Vcenter-as-compute case,
there isn¹t a 1-to-1 relation between nova-compute and vrouter.
There is in fact 1 separate nova-compute node managing multiple
vrouter nodes.
_is_dpdk_enabled() is generating exception since _get_vrouter_config()
returns 400 errorCode, when it doesn¹t find the vRouter.

Solution:
If contrail neutron plugin doesn't find the vrouter, it won't generate
exception. Also is_dpdk_enabled() will return False for such a case.

Closes-Bug #1539812

Change-Id: Ifa1c4f8e6e4667161a3249d90ee6a94213d97f67