MONITOR: Do not set up watchdog for monitor
    
    It makes little sense to set up watchdog for monitor because there is no
    entity that would restart the monitor. Therefore we should disable the
    watchdog for monitor process.
    
    Resolves:
    https://fedorahosted.org/sssd/ticket/3232
    
    Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>