Removed create TLDs for tests that don't test TLds directly

Related-Prod: PRODX-29973
Change-Id: I07693f417a746c479b6f8b22a65adc120b959e73
diff --git a/designate_tempest_plugin/tests/base.py b/designate_tempest_plugin/tests/base.py
index 3cbd4ca..22e8ae6 100644
--- a/designate_tempest_plugin/tests/base.py
+++ b/designate_tempest_plugin/tests/base.py
@@ -188,6 +188,8 @@
 
     all_projects_header = {'X-Auth-All-Projects': True}
     managed_records = {'x-designate-edit-managed-records': True}
+    tld_suffix = CONF.dns.tld_suffix
+    tld_name = '.{}.'.format(tld_suffix)
 
     @classmethod
     def skip_checks(cls):