Why I did it
The Dockerfile of docker-sonic-mgmt became a little bit messy over time. Some packages are also a little bit too old. It would be better to do some cleanup and upgrade some important packages.
How I did it
Updated the dockerfile template for building docker-sonic-mgmt.
How to verify it
Locally built the docker-sonic-mgmt image and used it to run some test scripts.
Description for the changelog:
The build-essential package contains gcc and make. It's unnecessary to install them again.
The python-is-python2 package is included in the python package for Ubuntu 20.04. It's unnecessary to install it again.
Sort the apt and pip packages by alphabetic order.
Cleanup get-pip.py after installation.
Cleanup the python-scapy deb package after installation.
Ensure that the python pip, setuptools and wheel packages are up to date.
Install pytest-ansible from pip instead of from source code.
While installing docker-ce-cli, it's unnecessary to install curl and software-properties-common again.
Merged some pip install steps into one step.
Upgrade ansible from 2.8.12 to 2.9.27 for env-python3.
Upgrade pytest to 7.1.3 for env-python3.
Add ncclient package to evn-python3.
a07aaca831