### 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?
Hotfix for CI
### What type of PR is it?
- Hot Fix
### How should this be tested?
* CI should run
### 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#4265 from Reamer/jupyter_bugfix and squashes the following commits:
dad1ff950 [Philipp Dallig] Add ipython_genutils
### What is this PR for?
The root cause is due to ast api is changed after python 3.8, see https://github.com/ipython/ipython/pull/11593.
* The PR fixed this issue in `zeppelin_python.py`.
* This PR add tests for Python 3.8 for both python interpreter & spark interpreter (spark 2.4 doesn't support python 3.8, so there's no python 3.8 test for spark 2.4). `jupyter_client` 5 is used because jupyter_client 7 doesn't work (tracked in ZEPPELIN-5533)
* bokeh test is disabled for flink interpreter. Because pyflink's dependencies conflicts with bokeh2.
### What type of PR is it?
[Bug Fix ]
### Todos
* [ ] - Task
### What is the Jira issue?
* https://issues.apache.org/jira/browse/ZEPPELIN-5525
### 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#4230 from zjffdu/ZEPPELIN-5525 and squashes the following commits:
b816a530c0 [Jeff Zhang] [ZEPPELIN-5525] Python vanillar interpreter doesn't' work in Python 3.8
