RFR: 8220083: Use InetAddress.getLoopbackAddress() in place of 127.0.0.1 for some tests

[Chris Hegarty]

Arthur,

> On 12 Mar 2019, at 17:54, Arthur Eubanks <aeubanks at google.com> wrote:
> 
> Thanks!
> 
> Just curious, what tests did you run and under what environment?

I ran all java/net, sun/net, com/sun/net/, and some nio. I'm have a bit
of a hacky environment: a JDK build with IPV6_V6ONLY set to 1, and 
preferIPv6Addresses effectively forced. The /etc/hosts on my system
returns IPv6 addresses for `localhost` and the machine host name. This
env reproduces the same set of failures as you ( I assume from your 
webrev ), and more. It's just enough to get me started and able to
review / help out.

-Chris.