Lock down ports and use AS friendly system properties in JGroups config files

Lock down FD_SOCK start port in shipped configuration and use AS ServiceBindingManager friendly properties:

<FD_SOCK start_port="${jboss.jgroups.udp.fd_sock_port:54200}"/>

and

• diagnostics when it is enabled
  enable_diagnostics="${jboss.jgroups.enable_diagnostics:true}"
  diagnostics_addr="${jboss.jgroups.diagnostics_addr:224.0.75.75}"
  diagnostics_port="${jboss.jgroups.diagnostics_port:7500}"

• the UDP unicast bind port
  bind_port="${jboss.jgroups.udp.bind_port:55200}"