Fix search depth for mongorestore files
Fix search depth for mongorestore files

This commit changes the search depth from 5 to 6 when looking for Mongo files to restore. Mongo dump files seem to be one level lower in the directory structure than before.
alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet