Disable 'preferBuiltins' to load local utils

This fixes the warning (!) Plugin node-resolve: preferring built-in module 'util' over local alternative at '/home/dexter/rally-core-addon/node_modules/util/util.js', pass 'preferBuiltins: false' to disable this behavior or 'preferBuiltins: true' to disable this warning

rollup.config.addon.js

@@ -32,6 +32,9 @@ export default (cliArgs) => {
       }),
       resolve({
         browser: true,
+        // This is required in order for rollup to pick up
+        // the correct dependencies for ping encryption.
+        preferBuiltins: false,
       }),
       commonjs(),
     ],