adjust tests for new current vlan segment methods

Author: Milan Fencik

python/neutron-understack/neutron_understack/tests/test_trunk.py

@@ -108,6 +108,9 @@ def test_when_parent_port_is_bound(
             "neutron_understack.utils.allocate_dynamic_segment",
             return_value=vlan_network_segment,
         )
+        mocker.patch(
+            "neutron_understack.utils.network_segment_by_physnet", return_value=None
+        )
         mocker.patch("neutron_understack.utils.create_binding_profile_level")
         mocker.patch.object(understack_trunk_driver.nb, "add_port_vlan_associations")
         understack_trunk_driver._handle_tenant_vlan_id_and_switchport_config(