Mark "test_port_creation_and_deletion" as unstable

Related-Bug: #2006603
Change-Id: Icbd0bb46a8a8c169279301b26ac92e0f459e1d87
(cherry picked from commit 4ad979a)

Author: ralonsoh

neutron/tests/functional/agent/ovn/extensions/test_qos_hwol.py

@@ -22,6 +22,7 @@
 from neutron.common.ovn import constants as ovn_const
 from neutron.common.ovn import utils
 from neutron.common import utils as n_utils
+from neutron.tests import base as test_base
 from neutron.tests.functional import base
 
 
@@ -32,6 +33,7 @@ def _cleanup(self):
             check_error=False)
         self.ovs_idl.del_br(self.br_name).execute(check_error=False)
 
+    @test_base.unstable_test('bug 2006603')
     def test_port_creation_and_deletion(self):
         def check_add_port_called():
             try: