public void setWorkerId(String workerId) {
        this.workerId = workerId;
    }
@param workerId a free form string identifying the worker host. Could be hostname, IP Address
    or any other meaningful identifier that can help identify the host/process which executed
    the task, in case of troubleshooting.
common/src/main/java/com/netflix/conductor/common/metadata/tasks/TaskResult.java