Fix name of the VN name param

Change-Id: Icc0404ee9d70d72f8791af27881a4250e3dd1de8
diff --git a/_modules/contrail.py b/_modules/contrail.py
index d38a71d..df33d78 100644
--- a/_modules/contrail.py
+++ b/_modules/contrail.py
@@ -1624,7 +1624,7 @@
                                                vn_project])
     # check if the network exists
     vn_networks_list = vnc_client._objects_list('virtual_network')
-    fq = [vn_domain, vn_project, vn_name]
+    fq = [vn_domain, vn_project, name]
     for network in vn_networks_list['virtual-networks']:
         if fq == network['fq_name']:
             ret['comment'] = ("Virtual network with name "