[SPARK-21835][SQL][FOLLOW-UP] RewritePredicateSubquery should not produce unresolved query plans

[viirya]

What changes were proposed in this pull request?

This is a follow-up of #19050 to deal with ExistenceJoin case.

How was this patch tested?

Added test.

[viirya]

cc @gatorsmile for review. Thanks.

[SparkQA]

Test build #81486 has finished for PR 19151 at commit 4fc4d05.

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

[SparkQA]

Test build #81489 has finished for PR 19151 at commit f05f281.

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

[gatorsmile]

LGTM

[gatorsmile]

Thanks! Merged to master.

[viirya]

Thanks @gatorsmile