[KYUUBI #526] Support kyuubi.operation.scheduler.pool for queries
 [](https://github.com/yaooqinn/kyuubi/pull/528)      [<img width="16" alt="Powered by Pull Request Badge" src="https://user-images.githubusercontent.com/1393946/111216524-d2bb8e00-85d4-11eb-821b-ed4c00989c02.png">](https://pullrequestbadge.com/?utm_medium=github&utm_source=yaooqinn&utm_campaign=badge_info)<!-- PR-BADGE: PLEASE DO NOT REMOVE THIS COMMENT -->
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### _Why are the changes needed?_
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Support scheduler pool which is native supported by Spark.
### _How was this patch tested?_
Pass CI
+
Manual tets
The default pool name is `default`, aflter execute `set kyuubi.operation.scheduler.pool = default1;`, the pool changed.
Closes #528 from ulysses-you/support-spark-scheduler-mode.
1ba8e89 [ulysses-you] fux
746cb62 [ulysses-you] constraint
1b369a9 [ulysses-you] conf
ec49c72 [ulysses-you] init
Authored-by: ulysses-you <ulyssesyou18@gmail.com>
Signed-off-by: ulysses-you <ulyssesyou18@gmail.com>
c458d853c4
