hobbit.sh stop does no kill vmstat

[Charles Jones]

when I do ./hobbit.sh stop, vmstat is not killed:
$ ps xw |grep hobbit
26903 ?        S      0:00 sh -c vmstat 300 2 
1>/users/monitor/local/hobbit/client/tmp/hobbit_vmstat.my-host.26883 
2>&1; mv 
/users/monitor/local/hobbit/client/tmp/hobbit_vmstat.my-host.26883 
/users/monitor/local/hobbit/client/tmp/hobbit_vmstat.my-host

I noticed that if I do several "hobbit.sh restart", there will be extra 
vmstat processes running.
For now I am manually killing them via "pkill vmstat" (on linux), after 
I stop or restart Hobbit.

-Charles