Add Parameter	storageType : StorageType in method public startDataNodes(conf Configuration, numDataNodes int, storageType StorageType, manageDfsDirs boolean, operation StartupOption, racks String[], hosts String[], simulatedCapacities long[], setupHostsFile boolean, checkDataNodeAddrConfig boolean, checkDataNodeHostConfig boolean) : void from class org.apache.hadoop.hdfs.MiniDFSClusterWithNodeGroup