Call this method in a module containing a test suite. The stack trace from
    which call descriptor hashes are derived will be truncated at this module.

def register_suite():
    """
    Call this method in a module containing a test suite. The stack trace from
    which call descriptor hashes are derived will be truncated at this module.

    """
    global test_suite
    frm = inspect.stack()[1]
    test_suite = ".".join(os.path.basename(frm[1]).split('.')[0:-1])