Add a trunk rally test

This adds a basic rally scenario to create a trunk
with a bunch of subports so we can keep an eye on the
performance of the trunk API.

Change-Id: I12aaf6121b677e9696131601b3539a7091e2858c

rally-jobs/neutron-neutron.yaml

@@ -305,4 +305,19 @@
       sla:
         failure_rate:
           max: 0
-
+  NeutronTrunks.create_and_list_trunk_subports:
+    -
+      args:
+        subport_count: 50
+      runner:
+        type: "constant"
+        times: 10
+        concurrency: 4
+      context:
+        users:
+          tenants: 1
+          users_per_tenant: 1
+        quotas:
+          neutron:
+            network: -1
+            port: -1

rally-jobs/plugins/trunk_scenario.py

@@ -0,0 +1,54 @@
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from rally import consts
+from rally.plugins.openstack import scenario
+from rally.plugins.openstack.scenarios.neutron import utils
+from rally.task import atomic
+from rally.task import validation
+
+
+"""Scenarios for VLAN Aware VMs."""
+
+
+@validation.required_services(consts.Service.NEUTRON)
+@validation.required_openstack(users=True)
+@scenario.configure(context={"cleanup": ["neutron"]},
+                    name="NeutronTrunks.create_and_list_trunk_subports")
+class TrunkLifeCycle(utils.NeutronScenario):
+
+    def run(self, subport_count=50):
+        net = self._create_network({})
+        ports = [self._create_port(net, {}) for i in range(subport_count)]
+        parent, subports = ports[0], ports[1:]
+        subport_payload = [{'port_id': p['port']['id'],
+                            'segmentation_type': 'vlan',
+                            'segmentation_id': seg_id}
+                           for seg_id, p in enumerate(subports, start=1)]
+        trunk_payload = {'port_id': parent['port']['id'],
+                         'sub_ports': subport_payload}
+        trunk = self._create_trunk(trunk_payload)
+        self._list_trunks(id=trunk['trunk']['id'])
+        self._delete_trunk(trunk['trunk']['id'])
+
+    @atomic.action_timer("neutron.delete_trunk")
+    def _delete_trunk(self, trunk_id):
+        self.clients("neutron").delete_trunk(trunk_id)
+
+    @atomic.action_timer("neutron.create_trunk")
+    def _create_trunk(self, trunk_payload):
+        return self.clients("neutron").create_trunk({'trunk': trunk_payload})
+
+    @atomic.optional_action_timer("neutron.list_trunks")
+    def _list_trunks(self, **kwargs):
+        return self.clients("neutron").list_trunks(**kwargs)["trunks"]