dependency Apache Ecalibur moved to the Attic

Gump wrote:
> To whom it may engage...
>         
> This is an automated request, but not an unsolicited one. For 
> more information please visit http://gump.apache.org/nagged.html, 
> and/or contact the folk at [email protected].
> 
> Project forrest-test-basic has an issue affecting its community integration.
> This issue affects 1 projects,
>  and has been outstanding for 2 runs.
[ snip ]
>      [java] 	at org.apache.cocoon.Main.main(Main.java:320)
>      [java] Caused by: java.lang.ClassNotFoundException: org.apache.excalibur.instrument.InstrumentManageable
>      [java] 	at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
[ snip ]

Apache Excalibur has moved to Apache Attic.
Stefan re-organised the various gump descriptors.
However one was missed. Fixed now.

-David