Fixing typo in config.py

Change-Id: Iedf697bf3fd83854626f1513da81885428d723f4
diff --git a/etc/tempest.conf.sample b/etc/tempest.conf.sample
index 441e17c..b396503 100644
--- a/etc/tempest.conf.sample
+++ b/etc/tempest.conf.sample
@@ -750,7 +750,7 @@
 # Catalog type of the Neutron service. (string value)
 #catalog_type = network
 
-# List of dns servers whichs hould be used for subnet creation (list
+# List of dns servers which should be used for subnet creation (list
 # value)
 #dns_servers = 8.8.8.8,8.8.4.4
 
diff --git a/tempest/config.py b/tempest/config.py
index dbe9bc2..bbfe70b 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -469,7 +469,7 @@
                     "checks."),
     cfg.ListOpt('dns_servers',
                 default=["8.8.8.8", "8.8.4.4"],
-                help="List of dns servers whichs hould be used"
+                help="List of dns servers which should be used"
                      " for subnet creation")
 ]