Bugfix: Dead code in return status handling.

Bugfix: Dead code in return status handling.

The fake_make_operate_process_return() has dead code where it checks for the inverse of the return_code in two spots.
The first of which always returns.
The second case can never be reached.

Redesign the function.
This success/failure behavior should be preserved with this change.

Add a simple example fakefile for testing the return code value.