Fix error on listener OPERATING_STATUS check

This patch fixes the check for listeners that
have been created with admin_state_up = False,
when running a driver in non-noop mode.

By error it is checking that the listener
is in ONLINE status, when this particular case
requires checking OFFLINE.

Change-Id: I07a9f6abdef29334d70e30755bb948c5b0b65d54
diff --git a/octavia_tempest_plugin/tests/api/v2/test_listener.py b/octavia_tempest_plugin/tests/api/v2/test_listener.py
index 2517a83..e62c86c 100644
--- a/octavia_tempest_plugin/tests/api/v2/test_listener.py
+++ b/octavia_tempest_plugin/tests/api/v2/test_listener.py
@@ -542,7 +542,7 @@
                 CONF.load_balancer.build_timeout)
             listener3 = waiters.wait_for_status(
                 self.mem_listener_client.show_listener, listener3[const.ID],
-                const.OPERATING_STATUS, const.ONLINE,
+                const.OPERATING_STATUS, const.OFFLINE,
                 CONF.load_balancer.build_interval,
                 CONF.load_balancer.build_timeout)