[SPARK-11676][SQL] Parquet filter tests all pass if filters are not really pushed down

[HyukjinKwon]

Currently Parquet predicate tests all pass even if filters are not pushed down or this is disabled.

In this PR, For checking evaluating filters, Simply it makes the expression from expression.Filter and then try to create filters just like Spark does.

For checking the results, this manually accesses to the child rdd (of expression.Filter) and produces the results which should be filtered properly, and then compares it to expected values.

Now, if filters are not pushed down or this is disabled, this throws exceptions.

[liancheng]

This assertion is redundant since we've already specified ParquetRelation in the pattern match.

[SparkQA]

Test build #45727 has finished for PR 9659 at commit 8cc842f.

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

[liancheng]

retest this please

[SparkQA]

Test build #45730 has finished for PR 9659 at commit 8cc842f.

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

[SparkQA]

Test build #45796 has finished for PR 9659 at commit 02fa055.

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

[HyukjinKwon]

In this commit, I resolved conflicts, renamed the function extractSourceRDDToDataFrame to stripSparkFilter and set false to spark.sql.parquet.enableUnsafeRowRecordReader.

[HyukjinKwon]

retest this please

[SparkQA]

Test build #47391 has finished for PR 9659 at commit 9861d96.

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

[SparkQA]

Test build #47407 has finished for PR 9659 at commit 372c99e.

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

[liancheng]

Nit: Actually you can specify multiple confs within a single withSQLConf call.

But I think it's OK to leave it here.

[HyukjinKwon]

I see. Thanks!

[liancheng]

Thanks for working on this! Merging to master. (Actually I thought I've already merged this one.)