LICENSE & NOTICE: duplicated entries

Reported by Emmanuel Lécharny in syncope-dev@ [1]

While checking the release, I found that the generated NOTICE file in build-tools/target/syncope-build-tools-1.0.0-incubating/META-INF/ contains more than one references on many components :

3 references on Groovy,

2 references to QOS :
"This product includes software developed by QOS.ch.
Copyright (C) 1999-2011, QOS.ch. All rights reserved.
This software is included in binary form only."
and
"This product includes software developed by QOS.ch
Copyright (c) 2004-2011 QOS.ch
All rights reserved."

Same for console/target/syncope-console/META-INF/NOTICE, core/target/cargo/configurations/tomcat7x/webapps/syncope/META-INF/NOTICE, core/target/syncope/META-INF/NOTICE and legal_ext/NOTICE.

[1] http://syncope-dev.1063484.n5.nabble.com/VOTE-Apache-Syncope-1-0-0-incubating-take-2-tp5710320p5710330.html