[SPARK-9095] [SQL] Removes the old Parquet support

[liancheng]

This PR removes the old Parquet support:

• Removes the old ParquetRelation together with related SQL configuration, plan nodes, strategies, utility classes, and test suites.

• Renames ParquetRelation2 to ParquetRelation

• Renames RowReadSupport and RowRecordMaterializer to CatalystReadSupport and CatalystRecordMaterializer respectively, and moved them to separate files.

  This follows naming convention used in other Parquet data models implemented in parquet-mr. It should be easier for developers who are familiar with Parquet to follow.

There's still some other code that can be cleaned up. Especially RowWriteSupport. But I'd like to leave this part to SPARK-8848.

[SparkQA]

Test build #37493 has finished for PR 7441 at commit 978c604.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[liancheng]

retest this please

[SparkQA]

Test build #37936 has finished for PR 7441 at commit 072f0d2.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #37944 has finished for PR 7441 at commit 072f0d2.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #38071 has finished for PR 7441 at commit dc93730.

• This patch fails to build.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #38070 has finished for PR 7441 at commit ba9b3da.

• This patch fails to build.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #1170 has finished for PR 7441 at commit dc93730.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[liancheng]

retest this please

[SparkQA]

Test build #38164 has finished for PR 7441 at commit dc93730.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[liancheng]

cc @marmbrus

[SparkQA]

Test build #38458 has finished for PR 7441 at commit c7b6e38.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[rxin]

Thanks - I've merged this.