Rally scenario boot_and_delete_server_with_keypair failed

Subtask Configuration
{
  "NovaKeypair.boot_and_delete_server_with_keypair": [
    {
      "runner": {
        "type": "constant",
        "concurrency": 5,
        "times": 13
      },
      "args": {
        "flavor": {
          "name": "m1.nano"
        },
        "auto_assign_nic": true,
        "image": {
          "name": "TestVM"
        }
      },
      "sla": {
        "failure_rate": {
          "max": 0
        }
      },
      "context": {
        "users": {
          "project_domain": "default",
          "users_per_tenant": 2,
          "tenants": 2,
          "resource_management_workers": 20,
          "user_domain": "default"
        },
        "quotas": {
          "neutron": {
            "subnet": -1,
            "network": -1,
            "port": -1
          },
          "nova": {
            "ram": -1,
            "floating_ips": -1,
            "key_pairs": -1,
            "instances": -1,
            "security_group_rules": -1,
            "cores": -1,
            "security_groups": -1
          }
        },
        "network": {
          "network_create_args": {
            "tenant_id": "5c426fa9fc29460ca6d1d11a2445c8c3",
            "name": "c_rally_b4d23537_QJd8EG6N"
          },
          "subnets_per_network": 1,
          "start_cidr": "1.0.0.0/25",
          "networks_per_tenant": 1
        }
      }
    }
  ]
}

Actual result:
Traceback (most recent call last):
  File "/opt/stack/.venv/lib/python2.7/site-packages/rally/task/runner.py", line 64, in _run_scenario_once
    getattr(scenario_inst, method_name)(**kwargs)
  File "/opt/stack/.venv/lib/python2.7/site-packages/rally/common/logging.py", line 266, in wrapper
    result = f(*args, **kwargs)
  File "/opt/stack/.venv/lib/python2.7/site-packages/rally/plugins/openstack/scenarios/nova/keypairs.py", line 86, in boot_and_delete_server_with_keypair
    keypair = self._create_keypair(**kwargs)
  File "/opt/stack/.venv/lib/python2.7/site-packages/rally/task/atomic.py", line 84, in func_atomic_actions
    f = func(self, *args, **kwargs)
  File "/opt/stack/.venv/lib/python2.7/site-packages/rally/plugins/openstack/scenarios/nova/utils.py", line 521, in _create_keypair
    keypair = self.clients("nova").keypairs.create(keypair_name, **kwargs)
  File "/opt/stack/.venv/lib/python2.7/site-packages/novaclient/api_versions.py", line 378, in substitution
    return methods[-1].func(obj, *args, **kwargs)
TypeError: create() got an unexpected keyword argument 'auto_assign_nic'

More info: http://mos-scale.vm.mirantis.net/test_results/build_8.0.0-570/jenkins-13_env_run_rally-63-ubuntu-MSK-2016-07-06-11:04:31-2016-07-07-02:20:15/rally_report.html#