Simplest would be to add a configuration option (for nuxeo.conf or any nuxeo.defaults) to bypass the address check. However, are you sure Tomcat will be able to bind that address if it's not reachable?
What about the org.nuxeo.launcher.config.ConfigurationGenerator.checkPortAvailable(InetAddress, int) next check? Will it fail too and must also be bypassed?
Those checks were initially added to early detect the situations leading to the "Address already in use" error at server (Tomcat/JBoss) startup.
