[ONOS-3949] Add chartBuilder.js, interacts with ChartRequestHandler

- Add unit test for chartBuilder.js

Change-Id: I2f5c56b878dda660c28af13ec0229b5ab3665156
diff --git a/web/gui/src/main/webapp/index.html b/web/gui/src/main/webapp/index.html
index 02bbafd..4f550d2 100644
--- a/web/gui/src/main/webapp/index.html
+++ b/web/gui/src/main/webapp/index.html
@@ -78,6 +78,7 @@
     <script src="app/fw/widget/tooltip.js"></script>
     <script src="app/fw/widget/button.js"></script>
     <script src="app/fw/widget/tableBuilder.js"></script>
+    <script src="app/fw/widget/chartBuilder.js"></script>
 
     <script src="app/fw/layer/layer.js"></script>
     <script src="app/fw/layer/panel.js"></script>