conf/completion: Only offer names of running parcels for "isr dirtometer"
conf/completion: Only offer names of running parcels for "isr dirtometer"

- When completing parcel names for "isr dirtometer", only offer parcels
which are currently running

cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr