Externalize JBossSX deps on Nuxeo5 authentication stack

This basically means we need to more EP

• one for the authentication filter
• one for the login module

These EP will be used to contribute the JBossSX specific code from a Jboss specific bundle.

• propagation call between Tomcat and Jboss inside the filter
• JBossSX specific call backs for propagation inside the LoginModule

This should not be complicated to do.
Just needs to be tested in multi-server to be sure it works.