Remove scoped cell.name property

All services now use <service>.cell.name to identify the name
of their primary cell. This patch removes the legacy cell.name
property (marked forbidden) and updates all scripts and batch
files to use the <service>.cell.name property instead.

There is no way to still support the legacy cell.name property
without the scoping operator.

Target: trunk
Require-book: yes
Require-notes: yes
Acked-by: Paul Millar <paul.millar@desy.de>
Patch: http://rb.dcache.org/r/5812/