replaced os.sytem (deprecated) with subprocess.call
replaced os.sytem (deprecated) with subprocess.call

jmichel-otb/s2p,dyoussef/s2p,carlodef/s2p,jmichel-otb/s2p,MISS3D/s2p,carlodef/s2p,dyoussef/s2p,MISS3D/s2p,jmichel-otb/s2p,dyoussef/s2p,mnhrdt/s2p,MISS3D/s2p,MISS3D/s2p,mnhrdt/s2p,jmichel-otb/s2p,dyoussef/s2p