Port mapit to govuk_postgresql::server
Port mapit to govuk_postgresql::server

This is for standardization. We are setting the listen_addresses
parameter back to the upstream default of 'localhost' and disabling
backups because this database can be recreated quickly, never changes
and exists in at least two copies in each environment.

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