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### _Why are the changes needed?_
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* Use apache/kyuubi docker hub repo instead of personal repo
* change workflow env to ubuntu-20.04
### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible
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Closes#1199 from ulysses-you/refine-docker.
Closes#1199
2ec73286 [ulysses-you] always
d6ed71b5 [ulysses-you] refine
Authored-by: ulysses-you <ulyssesyou18@gmail.com>
Signed-off-by: ulysses-you <ulyssesyou@apache.org>
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kyuubi-pod.yaml start a single kyuubi server, use deployment to start multiple servers.
### _How was this patch tested?_
- [X] Add some test cases that check the changes thoroughly including negative and positive cases if possible
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Closes#1048 from hddong/add-k8s-deployment.
Closes#1047
661463b9 [hongdongdong] [KYUUBI#1047] Use deployment to run kyuubi server HA on k8s
Authored-by: hongdongdong <hongdongdong@cmss.chinamobile.com>
Signed-off-by: Kent Yao <yao@apache.org>
