package-info.java trigger LocalURLClassLoader leak when hot-deploying Seam project

Steps to reproduce:

• create a new Seam project using the Nuxeo IDE
• add a package-info file on a the package of a Seam component (e.g. to add a javadoc for the package)
• start nuxeo server and re-deploy the project

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.