code: protected String create(String path, byte[] data) {
          try {
              return getClient().create().creatingParentsIfNeeded().forPath(path, data);
          } catch (Exception e) {
              throw new NiubiException(e);
          }
      }
docs: 创建一个节点
  
  @param path 节点路径
  @param data 节点数据
  @return 节点路径