Add an ability to configure allow_invisible_resource_usage

added an ability to configure allow_invisible_resource_usage in accordance with
change: https://review.opendev.org/#/c/721550/4

Related-prod: PRODX-4722
Change-Id: I7231537a2f9bad6fd1b4b36324719e932590d631
diff --git a/octavia_tempest_plugin/config.py b/octavia_tempest_plugin/config.py
index 8573d89..d056373 100644
--- a/octavia_tempest_plugin/config.py
+++ b/octavia_tempest_plugin/config.py
@@ -45,6 +45,10 @@
     cfg.StrOpt('catalog_type',
                default='load-balancer',
                help='Catalog type of the Octavia service.'),
+    cfg.BoolOpt('allow_invisible_resource_usage',
+                default=False,
+                help='Ability to use network resources that user cannot see '
+                     'or "show" on load balancers.'),
     cfg.StrOpt('endpoint_type',
                default='publicURL',
                choices=['public', 'admin', 'internal',