private static String getSchedulerLog(List<List<String>> logs) {
    if(logs==null || logs.isEmpty()) {
      return "";
    }
    StringBuilder builder = new StringBuilder();
    for(List<String> lines: logs) {
      for(String line: lines) {
        builder.append(line);
        builder.append("\n");
      }
    }
    return builder.toString();
  }
TAkes a list of strings and appends returns a single string
@param logs The logs by the scheduler
@return The scheduler logs
app/controllers/api/v1/Web.java