ONOS-4512 fix bug to get and delete

Change-Id: I952085be7548830b660e133cf1c59fcdf98e8f69
diff --git a/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/RouterWebResource.java b/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/RouterWebResource.java
index f8b87cc..855209c 100644
--- a/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/RouterWebResource.java
+++ b/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/RouterWebResource.java
@@ -83,6 +83,7 @@
 
     @GET
     @Produces(MediaType.APPLICATION_JSON)
+    @Consumes(MediaType.APPLICATION_JSON)
     public Response listRouters() {
         Collection<Router> routers = get(RouterService.class).getRouters();
         ObjectNode result = new ObjectMapper().createObjectNode();
@@ -93,6 +94,7 @@
     @GET
     @Path("{routerUUID}")
     @Produces(MediaType.APPLICATION_JSON)
+    @Consumes(MediaType.APPLICATION_JSON)
     public Response getRouter(@PathParam("routerUUID") String id,
                               @QueryParam("fields") List<String> fields) {