[hibernate-dev] New PostgreSQL users available on ci.hibernate.org

[Sanne Grinovero]

The postgres users as defined in Hibernate ORM's matrix configuration
are now setup on each slave for ci.hibernate.org.
  - https://github.com/hibernate/hibernate-orm/blob/master/databases/pgsql/resources/hibernate.properties

They have SUPERUSER privileges, so they can create/drop new databases
and do anything else these might need.

For restricted usage - like any testsuite which doesn't need such
privileges - we're keeping the previously defined users too.

https://github.com/hibernate/ci.hibernate.org/commit/2a4926bbd4dabf1767bfdac945d89bf606ba8614

Sanne