Explicitly return NO CONTENT type response for http DELETE request

Change-Id: I920084b92197bb1687e7d978ad350b2e1290ecbc
diff --git a/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/web/TunnelWebResource.java b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/web/TunnelWebResource.java
index 217a6b9..94fcd69 100644
--- a/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/web/TunnelWebResource.java
+++ b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/web/TunnelWebResource.java
@@ -64,7 +64,6 @@
      *
      * @param input JSON stream for tunnel to create
      * @return status of the request - OK if the tunnel is created,
-     * INTERNAL_SERVER_ERROR if the JSON is invalid or the tunnel cannot be created
      * @throws IOException if the JSON is invalid
      */
     @POST
@@ -83,8 +82,7 @@
      * Delete a segment routing tunnel.
      *
      * @param input JSON stream for tunnel to delete
-     * @return status of the request - OK if the tunnel is removed,
-     * INTERNAL_SERVER_ERROR otherwise
+     * @return 204 NO CONTENT, if the tunnel is removed
      * @throws IOException if JSON is invalid
      */
     @DELETE
@@ -96,7 +94,7 @@
         Tunnel tunnelInfo = TUNNEL_CODEC.decode(tunnelJson, this);
         srService.removeTunnel(tunnelInfo);
 
-        return Response.ok().build();
+        return Response.noContent().build();
     }
 
 }