Tempest test test_create_security_group_rule_wrong_ip_prefix_version fails

R3.0.2.0 Build 52 Liberty

tempest.api.network.test_security_groups_negative.NegativeSecGroupIPv6Test.test_create_security_group_rule_wrong_ip_prefix_version fails

The test tries to update a SG with ethertype IPv6 but prefix being a v4 IP and vice versa.
It is looking for a BadRequest exception to be thrown with message "Conflicting value ethertype"

Error seen :
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/tempest/api/network/test_security_groups_negative.py", line 237, in test_create_security_group_rule_wrong_ip_prefix_version
    remote_ip_prefix=pair['ip_prefix'])
  File "/usr/lib/python2.7/dist-packages/unittest2/case.py", line 1278, in assertRaisesRegex
    return context.handle('assertRaisesRegex', args, kwargs)
  File "/usr/lib/python2.7/dist-packages/unittest2/case.py", line 194, in handle
    callable_obj(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/tempest/lib/services/network/security_group_rules_client.py", line 21, in create_security_group_rule
    return self.create_resource(uri, post_data)
  File "/usr/local/lib/python2.7/dist-packages/tempest/lib/services/network/base.py", line 60, in create_resource
    resp, body = self.post(req_uri, req_post_data)
  File "/usr/local/lib/python2.7/dist-packages/tempest/lib/common/rest_client.py", line 270, in post
    return self.request('POST', url, extra_headers, headers, body, chunked)
  File "/usr/local/lib/python2.7/dist-packages/tempest/lib/common/rest_client.py", line 664, in request
    resp, resp_body)
  File "/usr/local/lib/python2.7/dist-packages/tempest/lib/common/rest_client.py", line 828, in _error_checker
    message=message)
ServerFault: Got server fault
Details: An unknown exception occurred.
=======

contrail-api log :

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/__init__.py", line 1002, in handler_trap_exception
    response = handler(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_interface.py", line 722, in plugin_http_post_securitygrouprule
    return self.plugin_create_sec_group_rule(context, sg_rule)
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_interface.py", line 678, in plugin_create_sec_group_rule
    sg_rule_info = cfgdb.security_group_rule_create(sg_rule['resource'])
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_db.py", line 2333, in wrapper
    return func(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_db.py", line 3977, in security_group_rule_create
    self._security_group_rule_create(sg_id, sg_rule)
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_db.py", line 211, in _security_group_rule_create
    self._vnc_lib.security_group_update(sg_vnc)
  File "/usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py", line 39, in wrapper
    return func(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py", line 442, in _object_update
    content = self._request_server(rest.OP_PUT, uri, data=json_body)
  File "/usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py", line 712, in _request_server
    retry_count=retry_count)
  File "/usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py", line 771, in _request
    raise BadRequest(status, content)
BadRequest: HTTP Status: 400 Content: Rule subnet 10.100.0.0/16 doesn't match ethertype IPv6