### What is this PR for?
Specify the jinjia2 version explicitly so that we won't get the error described in the jira.
### What type of PR is it?
[Bug Fix ]
### Todos
* [ ] - Task
### What is the Jira issue?
* https://issues.apache.org/jira/browse/ZEPPELIN-5693
### How should this be tested?
* CI pass
### Screenshots (if appropriate)
### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No
Author: Jeff Zhang <zjffdu@apache.org>
Closes#4331 from zjffdu/ZEPPELIN-5693 and squashes the following commits:
bff6509c3b [Jeff Zhang] [ZEPPELIN-5693] IPythonInterpreterTest.testIPythonPlotting fails due to jinjia2 version upgrade
### What is this PR for?
This PR will change the CI-System from [Travis](https://travis-ci.com/) to [GitHub Actions](https://github.com/features/actions)
**Advantages:**
- [high usage limits](https://docs.github.com/en/free-pro-teamlatest/actions/reference/usage-limits-billing-and-administration#usage-limits)
- No CI setup is required from the contributors
- good integration with GitHub Pull request
**Disadvantage:**
- At the moment we have some flappy tests and external dependencies. Both can cause a failed test, but we cannot restart a single job, only the entire workflow.
**Miscellaneous:**
- CI is triggered with every push event
- CI is triggered when PR event is open and synchronized
- Selenium test is updated to python3
- The Livy-Python2 test is dropped because Python2 has reached [the end of its lifetime](https://www.python.org/doc/sunset-python-2/)
### What type of PR is it?
- Improvement
### Todos
* [ ] - Feedback for job splitting
* [x] - What is the purpose of the Jenkins job?
### What is the Jira issue?
* https://issues.apache.org/jira/browse/ZEPPELIN-4385
### How should this be tested?
* Strongly recommended: add automated unit tests for any new or changed behavior
* Outline any manual steps to test the PR here.
### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No
Author: Philipp Dallig <philipp.dallig@gmail.com>
Closes#3986 from Reamer/github_actions and squashes the following commits:
eb13433a8 [Philipp Dallig] Goodbye travis
3de27c699 [Philipp Dallig] Adjust README
8302f5349 [Philipp Dallig] Adjust template for pull request
76d9bb22e [Philipp Dallig] Adjustments documentation
08155783e [Philipp Dallig] Remove travis_check.py
e865f2fc1 [Philipp Dallig] Remove "travis" in source code
6790b6e42 [Philipp Dallig] Add core.yml
27330791f [Philipp Dallig] Rewrite selenium tests to python3
1772024fc [Philipp Dallig] Add frontend tests
c81f48492 [Philipp Dallig] Add github actions workflow (rat)
18d5dbecb [Philipp Dallig] some cleanup
