Cleanup actions on send_command() for NAPALM getters.

        Remove "Load for five sec; one minute if in output"
        Remove "Time source is"

def _send_command_postprocess(output):
        """
        Cleanup actions on send_command() for NAPALM getters.

        Remove "Load for five sec; one minute if in output"
        Remove "Time source is"
        """
        output = re.sub(r"^Load for five secs.*$", "", output, flags=re.M)
        output = re.sub(r"^Time source is .*$", "", output, flags=re.M)
        return output.strip()