[SPARK-19448][SQL] optimize some duplication functions between HiveClientImpl and HiveUtils

## What changes were proposed in this pull request?

There are some duplicate functions between `HiveClientImpl` and `HiveUtils`, we can merge them to one place. such as: `toHiveTable` 、`toHivePartition`、`fromHivePartition`.

And additional modify is change `MetastoreRelation.attributes` to `MetastoreRelation.dataColKeys`
https://github.com/apache/spark/blob/master/sql/hive/src/main/scala/org/apache/spark/sql/hive/MetastoreRelation.scala#L234

## How was this patch tested?
N/A

Author: windpiger <songjun@outlook.com>

Closes #16787 from windpiger/todoInMetaStoreRelation.