[SPARK-18482][SQL] make sure Spark can access the table metadata created by older version of spark

## What changes were proposed in this pull request?

In Spark 2.1, we did a lot of refactor for `HiveExternalCatalog` and related code path. These refactor may introduce external behavior changes and break backward compatibility. e.g. http://issues.apache.org/jira/browse/SPARK-18464



To avoid future compatibility problems of `HiveExternalCatalog`, this PR dumps some typical table metadata from tables created by 2.0, and test if they can recognized by current version of Spark.

## How was this patch tested?

test only change

Author: Wenchen Fan <wenchen@databricks.com>

Closes #16003 from cloud-fan/test.

(cherry picked from commit fc2c13bd)
Signed-off-by: Reynold Xin <rxin@databricks.com>