Increase timeout for member's http request

Test sporadically fails with read timeout error. Use tempest's
option for http timeouts, which is 60 sec by default.

Timeout was already increased dur failures 2 -> 3. But it still
fails periodically.

Related-PRODX: PRODX-28295
Change-Id: I0243f8fe8da69c2b3de921b1d4f2a15c51f5d6cb
diff --git a/octavia_tempest_plugin/tests/scenario/v2/test_traffic_ops.py b/octavia_tempest_plugin/tests/scenario/v2/test_traffic_ops.py
index 72eac2d..2b31d6a 100644
--- a/octavia_tempest_plugin/tests/scenario/v2/test_traffic_ops.py
+++ b/octavia_tempest_plugin/tests/scenario/v2/test_traffic_ops.py
@@ -719,8 +719,10 @@
         # Increase timeout to cope with slow test systems.
         url_for_member2 = 'http://{}:{}/slow?delay=1s'.format(
             self.lb_vip_address, LISTENER_PORT)
-        self.assertConsistentResponse((200, self.webserver2_response),
-                                      url_for_member2, timeout=3)
+        self.assertConsistentResponse(
+            (200, self.webserver2_response),
+            url_for_member2,
+            timeout=CONF.service_clients.http_timeout)
 
         # Assert that /turtles is redirected to identity
         url_for_identity = 'http://{}:{}/turtles'.format(self.lb_vip_address,