Change how postgres permissions are done in dev
Change how postgres permissions are done in dev

By allowing the vagrant user createdb permissions, we can use the
standard Rails rake tasks to create/drop databases etc.  This will also
allow using ident auth.

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