Explicitly return NO CONTENT type response for http DELETE request

Change-Id: I920084b92197bb1687e7d978ad350b2e1290ecbc
diff --git a/web/api/src/main/java/org/onosproject/rest/resources/MetersWebResource.java b/web/api/src/main/java/org/onosproject/rest/resources/MetersWebResource.java
index 4e675f6..34a014f 100644
--- a/web/api/src/main/java/org/onosproject/rest/resources/MetersWebResource.java
+++ b/web/api/src/main/java/org/onosproject/rest/resources/MetersWebResource.java
@@ -165,11 +165,11 @@
      *
      * @param deviceId device identifier
      * @param meterId  meter identifier
+     * @return 204 NO CONTENT
      */
     @DELETE
-    @Produces(MediaType.APPLICATION_JSON)
     @Path("{deviceId}/{meterId}")
-    public void deleteMeterByDeviceIdAndMeterId(@PathParam("deviceId") String deviceId,
+    public Response deleteMeterByDeviceIdAndMeterId(@PathParam("deviceId") String deviceId,
                                                 @PathParam("meterId") String meterId) {
         DeviceId did = DeviceId.deviceId(deviceId);
         MeterId mid = MeterId.meterId(Long.valueOf(meterId));
@@ -178,6 +178,7 @@
             final MeterRequest meterRequest = meterToMeterRequest(tmpMeter, "REMOVE");
             meterService.withdraw(meterRequest, tmpMeter.id());
         }
+        return Response.noContent().build();
     }
 
     /**