![yaooqinn](https://badgen.net/badge/Hello/yaooqinn/green) [![PR 307](https://badgen.net/badge/Preview/PR%20307/blue)](https://github.com/yaooqinn/kyuubi/pull/307) ![Feature](https://badgen.net/badge/Label/Feature/) [&#10088;?&#10089;](https://pullrequestbadge.com/?utm_medium=github&utm_source=yaooqinn&utm_campaign=badge_info)<!-- PR-BADGE: PLEASE DO NOT REMOVE THIS COMMENT -->

<!--
Thanks for sending a pull request!  Here are some tips for you:
  1. If this is your first time, please read our contributor guidelines: https://kyuubi.readthedocs.io/en/latest/community/contributions.html
-->

### Please add issue ID here?
<!-- replace ${issue ID} with the actual issue id -->
Fixes #307

### Why are the changes needed?
<!--
Please clarify why the changes are needed. For instance,
  1. If you add a feature, you can talk about the user case of it.
  2. If you fix a bug, you can clarify why it is a bug.
-->

GetCatalogs supports DSv2 and keeps its backward compatibility

### Test Plan:
- [x] Add some test cases that check the changes thoroughly including negative and positive cases if possible
- [x] Add screenshots for manual tests if appropriate
![image](https://user-images.githubusercontent.com/8326978/106161043-7259c400-61c1-11eb-9beb-3326f6093284.png)

- [x] [Run test](https://kyuubi.readthedocs.io/en/latest/tools/testing.html#running-tests) locally before make a pull request

* GetCatalogs supports DSv2

* pr template

* nit

* nit

* shim

* add iceberg tests

* nit