Ubuntu 20.04 upgrade pyOpenSSL and cryptography

ubuntu-20.04-fix-pip3-python-openssl.sh

# python3-openssl is broken on ubuntu 20.04 (incompatible with python3-cryptography)
# remove these apt packages without removing their dependencies
# install latest version of these packages into system python
# then after re-installing the apt packages the pip installed packages are still used
sudo apt-get install -y python3-pip
sudo dpkg -r --force-depends python3-openssl python3-cryptography
sudo pip3 install pyopenssl cryptography
sudo apt-get install -y --fix-missing python3-openssl python3-cryptography