HTTP Tests: Fix authentication related failures

* Add new keys with ``
* Add publicDecrypt from Goiardi
* General test updates for reverted behavior.
* Rip out VerifyPKCS1v15 validation mechanism.
HTTP Test: Use goiardi chefcrypto HeaderDecrypt

* This means we don't have to have the decryption routines.
Merge pull request #21 from go-chef/fix-http-test

HTTP Tests: Fix authentication related failures