explorepolicy/random: fix param parsing
explorepolicy/random: fix param parsing

osrg/earthquake,AkihiroSuda/earthquake,osrg/earthquake,osrg/earthquake,AkihiroSuda/earthquake,AkihiroSuda/earthquake,osrg/namazu,osrg/earthquake,osrg/namazu,AkihiroSuda/earthquake,osrg/namazu,AkihiroSuda/earthquake,AkihiroSuda/earthquake,AkihiroSuda/earthquake,AkihiroSuda/earthquake,osrg/namazu,osrg/namazu,osrg/earthquake,osrg/earthquake,osrg/earthquake,osrg/namazu,osrg/namazu