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### _Why are the changes needed?_
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1. reduce one server bootstrap
2. remove explicitly hanging a test for 1 min long to wait for an unnecessary message
### _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
- [x] [Run test](https://kyuubi.readthedocs.io/en/latest/tools/testing.html#running-tests) locally before make a pull request
Closes#761 from yaooqinn/test2.
Closes#761
1d5c8cb4 [Kent Yao] style
e877348a [Kent Yao] simpler
7ade8ead [Kent Yao] simpler
46a11b8c [Kent Yao] Reduce explicit hang for test
Authored-by: Kent Yao <yao@apache.org>
Signed-off-by: Kent Yao <yao@apache.org>
ccce2d2792