Fix local copy of scenario manager

add back some methods that were pruned. They are used in tests running
on stable branches.

Change-Id: I2e0c979f870777d3f643ab8b87c5b1f0b9601c34
Closes-Bug: #1674597

ironic_tempest_plugin/manager.py

@@ -418,6 +418,50 @@ class ScenarioTest(tempest.test.BaseTestCase):
         else:
             raise lib_exc.InvalidConfiguration()
 
+    def _get_router(self, client=None, tenant_id=None):
+        """Retrieve a router for the given tenant id.
+
+        If a public router has been configured, it will be returned.
+
+        If a public router has not been configured, but a public
+        network has, a tenant router will be created and returned that
+        routes traffic to the public network.
+        """
+        if not client:
+            client = self.routers_client
+        if not tenant_id:
+            tenant_id = client.tenant_id
+        router_id = CONF.network.public_router_id
+        network_id = CONF.network.public_network_id
+        if router_id:
+            body = client.show_router(router_id)
+            return body['router']
+        elif network_id:
+            router = self._create_router(client, tenant_id)
+            kwargs = {'external_gateway_info': dict(network_id=network_id)}
+            router = client.update_router(router['id'], **kwargs)['router']
+            return router
+        else:
+            raise Exception("Neither of 'public_router_id' or "
+                            "'public_network_id' has been defined.")
+
+    def _create_router(self, client=None, tenant_id=None,
+                       namestart='router-smoke'):
+        if not client:
+            client = self.routers_client
+        if not tenant_id:
+            tenant_id = client.tenant_id
+        name = data_utils.rand_name(namestart)
+        result = client.create_router(name=name,
+                                      admin_state_up=True,
+                                      tenant_id=tenant_id)
+        router = result['router']
+        self.assertEqual(router['name'], name)
+        self.addCleanup(test_utils.call_and_ignore_notfound_exc,
+                        client.delete_router,
+                        router['id'])
+        return router
+
 
 class NetworkScenarioTest(ScenarioTest):
     """Base class for network scenario tests.