Refactored Neutron tempest plugin directory structure

* switch from neutron.tests.tempest to neutron_tempest_plugin
* Cleaned up README.rst and setup.cfg
* Use neutron_tempest_plugin as a tempest plugin package
* Fixed gitreview
* Keeping flake8 Ignores in tox.ini as tempest plugin is
  imported from neutron codebase.

Change-Id: I42d389836e72813fdeebc797a577f4a8ac2ee603
diff --git a/neutron_tempest_plugin/scenario/test_dvr.py b/neutron_tempest_plugin/scenario/test_dvr.py
new file mode 100644
index 0000000..3da0694
--- /dev/null
+++ b/neutron_tempest_plugin/scenario/test_dvr.py
@@ -0,0 +1,66 @@
+# Copyright 2016 Red Hat, Inc.
+# All Rights Reserved.
+#
+#    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 tempest.lib import decorators
+from tempest import test
+
+from neutron_lib import constants
+from neutron_tempest_plugin import config
+from neutron_tempest_plugin.scenario import base
+
+CONF = config.CONF
+
+
+class NetworkTestMixin(object):
+    def _check_connectivity(self):
+        self.check_connectivity(self.fip['floating_ip_address'],
+                                CONF.validation.image_ssh_user,
+                                self.keypair['private_key'])
+
+    def _check_snat_port_connectivity(self):
+        self._check_connectivity()
+
+        # Put the Router_SNAT port down to make sure the traffic flows through
+        # Compute node.
+        self._put_snat_port_down(self.network['id'])
+        self._check_connectivity()
+
+    def _put_snat_port_down(self, network_id):
+        port_id = self.client.list_ports(
+            network_id=network_id,
+            device_owner=constants.DEVICE_OWNER_ROUTER_SNAT)['ports'][0]['id']
+        self.os_admin.network_client.update_port(
+            port_id, admin_state_up=False)
+
+
+class NetworkDvrTest(base.BaseTempestTestCase, NetworkTestMixin):
+    credentials = ['primary', 'admin']
+    force_tenant_isolation = False
+
+    @classmethod
+    @test.requires_ext(extension="dvr", service="network")
+    def skip_checks(cls):
+        super(NetworkDvrTest, cls).skip_checks()
+
+    @decorators.idempotent_id('3d73ec1a-2ec6-45a9-b0f8-04a283d9d344')
+    def test_vm_reachable_through_compute(self):
+        """Check that the VM is reachable through compute node.
+
+        The test is done by putting the SNAT port down on controller node.
+        """
+        router = self.create_router_by_client(
+            distributed=True, tenant_id=self.client.tenant_id, is_admin=True,
+            ha=False)
+        self.setup_network_and_server(router=router)
+        self._check_snat_port_connectivity()