Pass tenant_id argument to create_router_by_client

It was never used in _ensure_public_router(), just pass
along to create_router_by_client as a kwarg.

Change-Id: Ib75531c08d51827dcc280fd3070fafd41c8f1463
Signed-off-by: Brian Haley <haleyb.dev@gmail.com>
diff --git a/neutron_tempest_plugin/scenario/base.py b/neutron_tempest_plugin/scenario/base.py
index f7d08eb..959262b 100644
--- a/neutron_tempest_plugin/scenario/base.py
+++ b/neutron_tempest_plugin/scenario/base.py
@@ -674,7 +674,7 @@
             body = client.show_router(router_id)
             return body['router']
         elif network_id:
-            router = self.create_router_by_client()
+            router = self.create_router_by_client(tenant_id=tenant_id)
             self.addCleanup(test_utils.call_and_ignore_notfound_exc,
                             client.delete_router, router['id'])
             kwargs = {'external_gateway_info': dict(network_id=network_id)}