Warp: resolves wrong URL for communication with proxy

That's because we use

InetAddress.getLocalHost().getHostAddress();

https://github.com/arquillian/arquillian-extension-warp/blob/1.0.0.Alpha5/impl/src/main/java/org/jboss/arquillian/warp/impl/client/proxy/DefaultURLMapping.java#L60

I think we should either

1) -copy the host from realUrl- or
2) iterate over all network interfaces and choose loopback one

[1] http://stackoverflow.com/questions/16444753/inetaddress-getlocalhost-gethostaddress-is-returning-127-0-1-1