change devtools/test_dashboard/server.js to use full url (include index.html) to prevent ERR_TOO_MANY_REDIRECTS error under Windows when running the 'npm start' script.

open('http://localhost:' + PORT + '/devtools/test_dashboard/index.html');

Author: greg9504

devtools/test_dashboard/server.js

@@ -23,7 +23,7 @@ var server = http.createServer(ecstatic({
 // Make watchified bundle for plotly.js
 var bundlePlotly = makeWatchifiedBundle(function() {
     // open up browser window on first bundle callback
-    open('http://localhost:' + PORT + '/devtools/test_dashboard');
+    open('http://localhost:' + PORT + '/devtools/test_dashboard/index.html');
 });
 
 // Bundle devtools code