Ensure apt fix gets applied before apt:update
Ensure apt fix gets applied before apt:update

The workaround for HTTP pipelining on the dev VM wasn't being applied
early enough, which meant that provisioning a new VM often failed.  This
ensures that it's applied before the initial `apt-get update`.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet