swapping: disable nagios swap-is-low checks on some chronic offenders
    
    Recent linux kernels seem to prefer swapping out things and filling swap
    up completely under any prressure on memory. These hosts seem to do that
    pretty often and the nagios alerts are anoying. The full swap doesn't
    seem to cause any issues, just nagios alerts. So, lets disable this
    check on these hosts that have had lots of these alerts.
    
    Signed-off-by: Kevin Fenzi <kevin@scrye.com>