Diff between stable and ubuntu 20.04

[KimEbert42]

Files that may need to be reviewed between stable and unbuntu 20.04

• diff --git a/.gitignore b/.gitignore
• diff --git a/ci/windows.dockerfile b/ci/windows.dockerfile
• diff --git a/plenum/common/script_helper.py b/plenum/common/script_helper.py
• diff --git a/plenum/server/node.py b/plenum/server/node.py
• diff --git a/plenum/server/request_handlers/nym_handler.py b/plenum/server/request_handlers/nym_handler.py
• diff --git a/plenum/server/request_managers/write_request_manager.py b/plenum/server/request_managers/write_request_manager.py
• diff --git a/plenum/server/validator_info_tool.py b/plenum/server/validator_info_tool.py
• diff --git a/plenum/test/conftest.py b/plenum/test/conftest.py
• diff --git a/plenum/test/consensus/view_change/test_sim_view_change.py b/plenum/test/consensus/view_change/test_sim_view_change.py
• diff --git a/plenum/test/helper.py b/plenum/test/helper.py

See https://gist.github.com/reflectivedevelopment/a8235814f9d336fdc100aae65dbb98e3 for my notes.