Fixes a bug introduced with r1624814. I forgot  that r1624549 has not been backported to R13.07, hence the ClassLoaderContainer.portOffset should still be used
Thanks to Adrian who warned in dev ML

git-svn-id: https://svn.apache.org/repos/asf/ofbiz/branches/release13.07@1625157 13f79535-47bb-0310-9956-ffa450edef68