新增count的实现，count时可以limit。

   public long count(RowKey startRowKey, RowKey endRowKey,
            @Nullable AggregateExtInfo aggregateExtInfo);
   public long count(RowKey startRowKey, RowKey endRowKey,
            @Nullable String id, @Nullable Map<String, Object> para,
            @Nullable AggregateExtInfo aggregateExtInfo);

新增countAndSum。

public long[] countAndSum(RowKey startRowKey, RowKey endRowKey);
public long[] countAndSum(RowKey startRowKey, RowKey endRowKey,
        @Nullable AggregateExtInfo aggregateExtInfo);
public long[] countAndSum(RowKey startRowKey, RowKey endRowKey,
        @Nullable String id, @Nullable Map<String, Object> para);
public long[] countAndSum(RowKey startRowKey, RowKey endRowKey,
        @Nullable String id, @Nullable Map<String, Object> para,
        @Nullable AggregateExtInfo aggregateExtInfo);

新增batch get功能。

public <T> List<T> findObjectBatch(List<RowKey> rowKeyList,Class<? extends T> type);
public <T> List<SimpleHbaseDOWithKeyResult<T>> findObjectAndKeyBatch(List<RowKey> rowKeyList, Class<? extends T> type);

调整测试代码。