fix helping solution

added template/helper, and added a bit of variety to the query string so it's harder to cheat!
I'm not sure the reason for this change. In the [current docs for hapi](https://github.com/spumko/hapi/blob/master/docs/Reference.md), it says:

>`helpersPath` - ... The files must export a single method with the signature `function(context)` and return a string. Sub-folders are not supported and are ignored....

I didn't check the code, though. Is the doc out of sync with the code?