Changed port to 0 to have an unused port assigned automatically.
add Id to exit reason to optimize cleanup

Was left out earlier waiting for the fix in OTP-7740.
use supervisor:terminate_child/2 to stop server

feature added in OTP-9201
clean new files in common_test log
remove bogus file
Merge branch 'master' of github.com:vances/radierl

Conflicts:
	src/radius.erl
	src/radius_fsm.erl