These were created using [pgloader](https://github.com/dimitri/pgloader)
MYSQL.sql was first imported into a mysql:5.7 Docker image, then pgloader
was used to import it into a postgres:11-alpine image. The schema and data
were then dumped using pg_dump into POSTGRESQL-structure.sql and POSTGRESQL-data-initial.sql
respectively
Also fix small bug in imported MYSQL syntax
WARNING: NOT tested in production
Tests were only done to create database structure, MISP wasn't run with
this database. It still could have incompatibilities with Model