The osixia/openldap image only runs bootstrap LDIF when the database is
empty. Named volumes (sail-ldap-data, sail-ldap-config) caused changes
to bootstrap.ldif to be ignored after the first run. Removing these
volumes ensures the test LDAP directory is always seeded fresh from the
bootstrap file on each sail up.
Add docker/openldap/bootstrap.ldif which creates an ou=people OU and
three test users (admin, approver, staff) each with a mail attribute,
matching the database seeder. Mount the LDIF into the openldap container
and add --copy-service so it is loaded on first boot.
Merge openldap service from docker-compose.yml into compose.yaml
and remove the duplicate file to fix the Docker Compose warning
about multiple config files.
