Log the main steps when performing a MySQL dump.
Log the main steps when performing a MySQL dump.

Previously there was no feedback as to what's going on at all. This
at least makes it easy to see what stage the script is at.

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