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### _Why are the changes needed?_
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This partial revert [KYUUBI #1203], recover codecov
### _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/develop_tools/testing.html#running-tests) locally before make a pull request
Closes#1238 from pan3793/mvn.
Closes#1238
b3ba87b2 [Cheng Pan] remove unnecessary changes
c124340a [Cheng Pan] nit
39c436be [Cheng Pan] pom
28546cbd [Cheng Pan] CI
f22e9c91 [Cheng Pan] nit
72e9542d [Cheng Pan] Rebase master
7cd1cba3 [Cheng Pan] [BUILD] Add back Scala stuff to root POM
Authored-by: Cheng Pan <chengpan@apache.org>
Signed-off-by: Cheng Pan <chengpan@apache.org>
eb5749d34b