code: public static List<String> executeScript(InstanceConfiguration config,
              CommandLine command,
              Map<String, String> environment,
              ProcessDestroyer processDestroyer)
      {
          return executeScript(config, command, environment, processDestroyer, false);
      }
docs: Run the given command as a process within the supplied instance config context
  and wait until it finalizes. An ElasticsearchSetupException is thrown if the exit code
  is not 0.
  @param config - the instance config
  @param command - the command to execute
  @param environment - a map of environment variables; can be null
  @param processDestroyer - a destroyer handler for the spawned process; can be null
  @return the output (not trimmed of whitespaces) of the given command, as separate lines