In IPAM get object response removed virtual_network_back_refs and do…

…ing put with virtual_dns_refs for R2.20.

 Ideally we should remove complete IPAM get itself and directly proceed with IAPM put. It may lead to test many scenarios, hence targeting  it to master.

Change-Id: I2aa04957d76b0cb5ed460b298c307953e8c9e48e
Closes-bug: #1465631

webroot/config/dns/api/virtualdnsconfig.api.js

@@ -909,6 +909,9 @@ function updateVirtualDnsUpdateIpams(error, results, vdnsConfig,
             }
         }
         results[i]['network-ipam']['network_ipam_mgmt'] = ipamNwIpamMgmtRefObj;
+        if(results[i]['network-ipam']["virtual_network_back_refs"] != null) {
+            delete results[i]['network-ipam']["virtual_network_back_refs"];
+        }
         commonUtils.createReqObj(dataObjArr, ipamURL, global.HTTP_REQUEST_PUT,
             results[i], null, null, appData);
     }