Typo fix in test code

Change-Id: Iccc5b2f212c09496c8f65005a68e52241e3213e3
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/network/test_vlan_network.robot b/network/test_vlan_network.robot
index 33542a4..a933929 100644
--- a/network/test_vlan_network.robot
+++ b/network/test_vlan_network.robot
@@ -322,7 +322,7 @@
 
     Run Keyword If  '${expected_result}' == 'valid'
     ...      Should Be Equal  ${status}  ${True}
-    ...      msg=VLAN IP URI Dosen't exist!.
+    ...      msg=VLAN IP URI doesn't exist!.
     ...  ELSE
     ...      Should Be Equal  ${status}  ${False}
     ...      msg=VLAN IP URI exists!.
@@ -353,7 +353,7 @@
     ...  msg=REST and CLI Output are not the same.
     Run Keyword If  '${expected_result}' == 'valid'
     ...      Should Be Equal  ${rest_status}  ${True}
-    ...      msg=VLAN ID Dosen't exist!.
+    ...      msg=VLAN ID doesn't exist!.
     ...  ELSE
     ...      Should Be Equal  ${rest_status}  ${False}
     ...      msg=VLAN ID exists!.