Package alterator-openldap: Information

- added support both database backends: deprecated HDB and new MDB
- deprecated backend template renamed to slapd-hdb-template.conf
- before create DN may set key SLAPD_BACKEND in /etc/sysconfig/ldap
- conditional creation DB_CONFIG for deprecated BDB/HDB backends
- added check and setup required backend modules to main slapd.conf
- changed access permissions to $db_dir for ldap group
- attention: new MDB backend template now used by default

- no more direct /etc/init.d/slapd calls

- Add default organization unit Computers