code: public static CliOutput executeCommandLine(final Commandline cli, final String loggerName) {
  		return executeCommandLine(cli, loggerName, null);
  	}
docs: Executes the specified command line and blocks until the process has finished. The output of
  the process is captured, returned, as well as logged with info (stdout) and error (stderr)
  level, respectively.
  
  @param cli
  the command line
  @param loggerName
  the name of the logger to use (passed to {@link LoggerFactory#getLogger(String)});
  if {@code null} this class' name is used
  @return the process' output