Start serveral process which process commands read from txt file
// Read txt file from commands.txt
// foreach every command, and start process with maxNumber number processes according to the command,
// then waiting the exist process exit and start new process to maxNumber number processes until all commands in commands are done.
// then show the final result: "All Pass", "Partial Pass, command "***" need to retry", "All Failed".
// if show the text with Green, Yellow, Red color on the console, it will be better.