updated docs to mention test method 'test_name' parameter
updated docs to mention test method 'test_name' parameter

related to this [issue](https://github.com/Origen-SDK/origen/issues/251)
Origen-SDK/origen,welguisz/origen,welguisz/origen,info-rchitect/origen,coreyeng/origen,Origen-SDK/origen,priyavadan/origen,coreyeng/origen,priyavadan/origen,info-rchitect/origen,welguisz/origen,info-rchitect/origen,priyavadan/origen,info-rchitect/origen,Origen-SDK/origen,coreyeng/origen,priyavadan/origen,Origen-SDK/origen,welguisz/origen,coreyeng/origen