Jboss does not find ajax resources with richfaces

Issue

• The server log is filled up with exceptions on the level of ajax resource configuration
  ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/test].[default]] (http-abctest/192.0.x.x:8080-5) "Servlet.service()" pour la servlet default a généré une exception: org.ajax4jsf.resource.ResourceNotFoundException: Resource not registered : css/panel.xcss/DATB