Removed scoped db.* properties.

Replaces all db.* properties with equivalent
<service>.db.* properties. The old db.* properties
are marked forbidden.

Scripts are updated to use the new names.

Target: trunk
Require-book: yes
Require-notes: yes
Acked-by: Paul Millar <paul.millar@desy.de>
Patch: http://rb.dcache.org/r/5822/