Add ability to restore from multiple postgres dump versions
Add ability to restore from multiple postgres dump versions

We now run pg_restore in docker which allow us to select the
version of pg_restore according the type of dump being restored.

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