[SPARK-29525][SQL][TEST] Fix the associated location already exists in SQLQueryTestSuite

[wangyum]

What changes were proposed in this pull request?

This PR fix Fix the associated location already exists in SQLQueryTestSuite:

build/sbt "~sql/test-only *SQLQueryTestSuite -- -z postgreSQL/join.sql"
...
[info] - postgreSQL/join.sql *** FAILED *** (35 seconds, 420 milliseconds)
[info]   postgreSQL/join.sql
[info]   Expected "[]", but got "[org.apache.spark.sql.AnalysisException
[info]   Can not create the managed table('`default`.`tt3`'). The associated location('file:/root/spark/sql/core/spark-warehouse/org.apache.spark.sql.SQLQueryTestSuite/tt3') already exists.;]" Result did not match for query #108

Why are the changes needed?

Fix bug.

Does this PR introduce any user-facing change?

No

How was this patch tested?

N/A

[SparkQA]

Test build #112340 has finished for PR 26181 at commit aee5cbd.

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

[wangyum]

cc @dongjoon-hyun

[dongjoon-hyun]

Thank you for pinging me, @wangyum .
+1, LGTM. Merged to master.

Since the original PostgreSQL test also create temp table and this file is join.sql, this update is more accurate and better.