Fix Angular2Spa production builds

Author: SteveSandersonMS

templates/Angular2Spa/webpack.config.vendor.js

@@ -34,7 +34,7 @@ module.exports = {
         new webpack.optimize.UglifyJsPlugin({
             compress: { warnings: false },
             minimize: true,
-            mangle: true // Due to https://github.com/angular/angular/issues/6678
+            mangle: false // Due to https://github.com/angular/angular/issues/6678
         })
     ])
 };