Add worker_type command-line option
Add worker_type command-line option

hirocaster/rrrspec,eagletmt/rrrspec,jaymanklu/rrrspec,cookpad/rrrspec,jaymanklu/rrrspec,sauliusgrigaitis/rrrspec,eagletmt/rrrspec,sauliusgrigaitis/rrrspec,jaymanklu/rrrspec,hirocaster/rrrspec,mcfiredrill/rrrspec,hirocaster/rrrspec,mcfiredrill/rrrspec,cookpad/rrrspec,mcfiredrill/rrrspec,sauliusgrigaitis/rrrspec,cookpad/rrrspec