Sorry about the delay in responding.
Actually the nobody-has-this-role errors come out of a mostly unchanged setup. All the files you mentioned are unchanged. I know because I'm the one who does the changing. I expand the distribution. Edit for port bindings, jgroup multicasting, instance names, and log4j configuration. Here is my web.xml from deploy\jbossweb-tomcat55.sar\ROOT.war\WEB-INF anyway.
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<display-name>Welcome to JBoss</display-name>
<description>
Welcome to JBoss
</description>
<servlet>
<servlet-name>Status Servlet</servlet-name>
<servlet-class>org.jboss.web.tomcat.tc5.StatusServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Status Servlet</servlet-name>
<url-pattern>/status</url-pattern>
</servlet-mapping>
</web-app>