Comment 6 for bug 1763422

For reference, this was originally triggered by the following in user_variables.yml

pip_global_conf_overrides:
  global:
    index-url: http://pip.os.mist.rd.bbc.co.uk/root/pypi/+simple
    trusted-host: "pip.os.mist.rd.bbc.co.uk {{ internal_lb_vip_address }}"