Why I did it
Add AZP agent necessary packages to sonic-mgmt-docker
Remove Python 201811 venv
Update some packages in order to meet internal security requirements
How I did it
Update sonic-mgmt-docker file
How to verify it
sonic-mgmt-docker can run: bash, apt update, apt install and ping.
start.sh is under /azp with exec permission.
env-201811 venv is removed.
jinja2 is upgrade to 2.10.1