--database-name or --database-table-prefix are ignored for sqlite

The default implementation of initialize in AbstractDatabase writes
database information to config.php. The method is overwritten in
Sqlite but parent is never called. Database-Name and Database-Table-Prefix
are never written to config.php. But from this point setup use values
from config.

Signed-off-by: Daniel Kesselberg <mail@danielkesselberg.de>