Don't abort virus scan if a file with error encountered
Don't abort virus scan if a file with error encountered

If clamav can't parse a file for some reason, we'll just treat it as
infected and log an error message. We've observed PDFs that had parsing
errors.

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