Test "Requests pipe can process a single GET with a body" of PipesSpec is failing in Windows OS

I faced an faling test when executed **PipesSpec** under Windows

I fixed it for myself with these steps:
- json body of **getWithBodyStream** was updated with "\r\n" line ending
- _Content-Length_ value was updated for **getWithBodyStream** and **getWithBodyRequest**

I would open a pull request if I had a permission on your source repo.