See https://jira.jboss.org/browse/JOPR-419 for details
I have started EAP5.0 GA and EAP 5.1 without params and both were discovered with server name Default and bind address 127.0.0.1.
Tested also on SOA-5 and I can not reproduce the bug.
QA Closing -- I am also not seeing this occur. I start it with no params and it gets properly discovered as Default profile, bind 127.0.0.1