Config Drive test case

* base test case
* fixes after Daryl review
* Removing the old test file
* Removing base from class name after Daryl review
* Fixed issues after review - changes in method names
* Added user data test case
* User data path modification

Change-Id: I2ce6f1eb2975a2e9451862792b65a2f29593ddb0
Merge "Config Drive test case"