[SPARK-16400][SQL] Remove InSet filter pushdown from Parquet

[rxin]

What changes were proposed in this pull request?

This patch removes InSet filter pushdown from Parquet data source, since row-based pushdown is not beneficial to Spark and brings extra complexity to the code base.

How was this patch tested?

N/A

[rxin]

cc @liancheng

[SparkQA]

Test build #61865 has finished for PR 14076 at commit 977ff10.

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

[SparkQA]

Test build #61876 has finished for PR 14076 at commit eb26650.

• This patch passes all tests.
• This patch does not merge cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #61877 has finished for PR 14076 at commit fbdcd7b.

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

[liancheng]

LGTM. Merging to master.