code: public <T> ESDatas<T> searchAll(String index,  Class<T> type) throws ElasticSearchException{
  
  		return searchAll(  index,    DEFAULT_FETCHSIZE , type) ;
  
  	}
docs: 检索索引所有数据
  @param index
  @param type
  @param <T>
  @return
  @throws ElasticSearchException