See http://bugs.bacula.org/bug_view_advanced_page.php?bug_id=0000103

Alter src/cats/make_catalog_backup.in so it does need incoming parameters to
do its job correctly.   Different options are needed for different database
tools.  e.g. '-u bacula' for MySQL, versus '-U bacula' for PostgreSQL.

At the same time, remove the parameters passed to this script in
src/dird/bacula-dir.conf.in