### _Why are the changes needed?_
Support to refresh the unlimited users for session limiter, so that we can unblock some customers without restart the kyuubi server.
### _How was this patch tested?_
- [x] 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/master/develop_tools/testing.html#running-tests) locally before make a pull request
Closes#4360 from turboFei/limier_whitelist.
Closes#4360
c846148bd [fwang12] typo
839e71365 [fwang12] nit
904bc9fbc [fwang12] save
Authored-by: fwang12 <fwang12@ebay.com>
Signed-off-by: fwang12 <fwang12@ebay.com>