Remove redundant toString() calls

Change-Id: Ibb91f90054d5791733353308e86d0494734f63aa
diff --git a/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/VirtualPortCodec.java b/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/VirtualPortCodec.java
index aa3c0c7..423dc27 100644
--- a/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/VirtualPortCodec.java
+++ b/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/VirtualPortCodec.java
@@ -36,16 +36,16 @@
                 .put("id", vPort.portId().toString())

                 .put("network_id", vPort.networkId().toString())

                 .put("admin_state_up", vPort.adminStateUp())

-                .put("name", vPort.name().toString())

+                .put("name", vPort.name())

                 .put("status", vPort.state().toString())

                 .put("mac_address", vPort.macAddress().toString())

                 .put("tenant_id", vPort.tenantId().toString())

                 .put("device_id", vPort.deviceId().toString())

-                .put("device_owner", vPort.deviceOwner().toString())

-                .put("binding:vnic_type", vPort.bindingVnicType().toString())

-                .put("binding:Vif_type", vPort.bindingVifType().toString())

+                .put("device_owner", vPort.deviceOwner())

+                .put("binding:vnic_type", vPort.bindingVnicType())

+                .put("binding:Vif_type", vPort.bindingVifType())

                 .put("binding:host_id", vPort.bindingHostId().toString())

-                .put("binding:vif_details", vPort.bindingVifDetails().toString());

+                .put("binding:vif_details", vPort.bindingVifDetails());

         result.set("allowed_address_pairs", new AllowedAddressPairCodec().encode(

                                                                                vPort.allowedAddressPairs(), context));

         result.set("fixed_ips", new FixedIpCodec().encode(