[RFR]: 8220575: Replace hardcoded 127.0.0.1 in URLs with new URI builder

[Pavel Rappo]

I've applied your patch and run through our test system. The 

    sun/net/www/protocol/http/B6890349.java 
    
test failed just like you said. I'm happy to say that it was the only test in
the whole networking area that failed. So test-wise it looks good.

-Pavel