Add test for quota set for invalid project

this also adds a feature flag "api_v2_quotas_verify_project" (False by
default) enabling which will enable this test.

Change-Id: Icdc1b9ae419c3634ab2c55005f33fed624706176
Related-Bug: #1760822
diff --git a/designate_tempest_plugin/config.py b/designate_tempest_plugin/config.py
index fea31f2..f81b8e9 100644
--- a/designate_tempest_plugin/config.py
+++ b/designate_tempest_plugin/config.py
@@ -77,6 +77,10 @@
     cfg.BoolOpt('api_v2_quotas',
                 default=False,
                 help="Is the v2 quota API enabled."),
+    cfg.BoolOpt('api_v2_quotas_verify_project',
+                default=False,
+                help="Is project IDs verified when setting v2 quotas. "
+                "Must be set to True starting from Rocky release."),
     cfg.BoolOpt('bug_1573141_fixed',
                 default=False,
                 help="Is https://bugs.launchpad.net/designate/+bug/1573141 "