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### _Why are the changes needed?_
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We may create multiple SparkContext in non-CONNECTION ShareLevel.
### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible
- [ ] Add screenshots for manual tests if appropriate
- [ ] [Run test](https://kyuubi.readthedocs.io/en/latest/tools/testing.html#running-tests) locally before make a pull request
Closes#624 from Honglun/feature/lock.
Closes#624
87445522 [Honglun] Add lock while creating engine with non-CONNECTION mode
Authored-by: Honglun <283471011@qq.com>
Signed-off-by: Cheng Pan <379377944@qq.com>
41f0274ba4