### _Why are the changes needed?_
Support internal rest request authentication to enable redirect http request across kyuubi instances
### _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.apache.org/docs/latest/develop_tools/testing.html#running-tests) locally before make a pull request
Closes#2719 from turboFei/internal_access.
Closes#2719
b9e150e9 [Fei Wang] revert config key change
aa378727 [Fei Wang] make it internal
ce96d922 [Fei Wang] comments
6fe8523b [Fei Wang] Support internal rest request authentication to enable redirect http request across kyuubi instances
Authored-by: Fei Wang <fwang12@ebay.com>
Signed-off-by: Fei Wang <fwang12@ebay.com>