[KYUUBI #463] Time configs can use long to define milliseconds directly
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### _Why are the changes needed?_
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Allow a time config with a long string representation directly, which is more convenient for end-users
### _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 #463 from yaooqinn/timeconf.
a42759e [Kent Yao] tests
def0596 [Kent Yao] tests
acc96e3 [Kent Yao] update tests
a5d0827 [Kent Yao] Time configs can use long to define milliseconds directly
Authored-by: Kent Yao <yao@apache.org>
Signed-off-by: Kent Yao <yao@apache.org>
4bb802a146
