Add a client for querying nameservers

Change-Id: I2d2eedcd162e7aeac4f3c9c92342bff448b4a5f5
diff --git a/designate_tempest_plugin/config.py b/designate_tempest_plugin/config.py
index 07e96b8..d813caa 100644
--- a/designate_tempest_plugin/config.py
+++ b/designate_tempest_plugin/config.py
@@ -34,5 +34,11 @@
     cfg.IntOpt('min_ttl',
                default=1,
                help="The minimum value to respect when generating ttls"),
+    cfg.ListOpt('nameservers',
+                default=[],
+                help="The nameservers to check for change going live"),
+    cfg.IntOpt('query_timeout',
+               default=1,
+               help="The timeout on a single dns query to a nameserver"),
 
 ]