Deprecate option for old api_export_size bug

This change deprecates the option to workaround the old bug. The bug
was fixed during Newton cycle and is fixed in all versions currently
maintained.

Related-Bug: #1573141
Change-Id: I88ca5b481f7728da38f53c4e67710314e78da24d

designate_tempest_plugin/config.py

@@ -79,6 +79,8 @@ DnsFeatureGroup = [
                 "Must be set to True starting from Rocky release."),
     cfg.BoolOpt('bug_1573141_fixed',
                 default=True,
+                deprecated_for_removal=True,
+                deprecated_reason='This bug was fixed in 3.0.0',
                 help="Is https://bugs.launchpad.net/designate/+bug/1573141 "
                 "fixed"),
     cfg.BoolOpt('bug_1932026_fixed',

releasenotes/notes/deprecate-bug-1573141-22b980751913bc44.yaml

@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    The ``[dns_feature_enabled] bug_1573141_fixed`` parameter has been
+    deprecated and will be removed in a future release.