@Unwrap causes LocalURLClassLoader leak when re-deploying Seam project using Nuxeo IDE

Steps to reproduce:

• create a new seam project using the IDE
• wrap a Nuxeo service as a Seam component using the @Unwrap / @Destroy annotations
• start nuxeo server and re-deploy

Observed: do a heap dump with JVisualVM: you will see two instances of LocalURLClassLoader instead of one
Expected: only one instance: otherwise class definitions can be

Derived problems: ClassCastException in the getAdapter method of Runtime components that are loaded by the "wrong" classloader.