def systemctl_show_pid_cmd(cmd, shell="bash"):
    """ Returns the output that systemctl show <service> would return

    This is a stub function.
    The expected usage of this function is to replace a Node object which
    is able to run CLI commands.

    The command being run is:

        systemctl show {service} --property=MainPID | cat

    And the value returned is:

        MainPID=1790

    This function ignores the input params and returns the normal output of
    systemctl which is similar to:

    For a running process:
        bash-4.3# systemctl show ops-sysd --property=MainPID | cat
        MainPID=1790
    """
    return ('MainPID=1790')