VS Code pytest debugging settings

launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Python: loadbalancer test",
            "type": "python",
            "request": "launch",
            "module": "pytest",
            "args": [
                "--no-cov"
            ],
            "pythonPath": "${workspaceFolder}/venv/bin",
            "program": "${workspaceFolder}/tests/test_loadbalancer.py"
        },
}

addresses microsoft/vscode-python#693