commit ad96136c3ec16750bc0ce4b0ce3a1a0e3bc50916
author Jeff Zhang <zjffdu@apache.org> Sun Jun 27 22:14:48 2021 +0800
committer Jeff Zhang <zjffdu@apache.org> Thu Jul 01 12:26:44 2021 +0800
tree 8076535b2eb1585d8368e58239a5a351176da1af
parent da4f1b4070aed8498e1ff41b96fbe59de7699b61

[ZEPPELIN-5286]. Unable to run some tutorial notes in zeppelin docker container

### What is this PR for?

2 notes needs to be updated:
* Python Tutorial/2. IPython Visualization Tutorial_2F1S9ZY8Z.zpln . Add the following 2 lines to ignore warning message. Otherwise there will be many warning message in frontend.
```
import logging
logging.getLogger("params").setLevel(logging.ERROR)
```
* Python Tutorial/3. Keras Binary Classification (IMDB)_2F2AVWJ77.zpln.  Add one paragraph to install keras & tensorflow, because we didn't install in it in docker container
* Specify number & holoviews version, otherwise ipython visualization won't work
* Add files log4j2.properties & log4j2_docker.properties, otherwise flink interpreter log will be missing because flink use log4j2

### What type of PR is it?
[Improvement ]

### Todos
* [ ] - Task

### What is the Jira issue?
* https://issues.apache.org/jira/browse/ZEPPELIN-5286

### How should this be tested?
* Manually tested

### 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 #4078 from zjffdu/ZEPPELIN-5286 and squashes the following commits:

2c7765f197 [Jeff Zhang] remove channel pyviz
fea92da3fa [Jeff Zhang] [ZEPPELIN-5286]. Unable to run some tutorial notes in zeppelin docker container