Corrected problem for servlet with mapping "/"

- JBoss AS 7.1.1.Final is using JBossWeb 7.0.10
  -> Since Apache Tomcat only supports overriding of the default servlet
     handler with Java Initializer method since 7.0.15, it is impossible
     to do it with JBossWeb 7.0.10 who is closely linked to Apache Tomcat
     7.0.10
  -> Work-around: usage of a "web.xml" for the configuration of the
     default servlet handler overriding (remaining configuration is still
     java based)
- Application is now correctly mapped at "localhost:8080"
- Spring Security problems still present: will now work on it