Fix path parameter validation when basePath is present

### What is the problem / feature ?

Request and Response path parameter validation is broken when working with an API with a base path.

### How did it get fixed / implemented ?

Stripped the base path off of the request/response path

### How can someone test / see it ?

Try validating a response/request for an api with a base path


*Here is a cute animal picture for your troubles...*

![pets-christmas-for-the-animal-197112](https://cloud.githubusercontent.com/assets/824194/5466810/90dc65c4-8570-11e4-9073-429cabd84c71.jpg)