Fix request path validation

### What is the problem / feature ?

Request path validation was broken in the recent 2.5.0 release.

### How did it get fixed / implemented ?

Needed to de-reference the parameters being passed into the path validation.

### How can someone test / see it ?

Try to validate a parametrized path.

*Here is a cute animal picture for your troubles...*

![54489-christmas-animals](https://cloud.githubusercontent.com/assets/824194/5463515/f471f65c-853a-11e4-8662-d0d373aea7a4.jpg)