RFR: 8235169: [TESTBUG] java/nio/channels/DatagramChannel/ManySenders.java fails on Ubuntu18.04

[Jie Fu]

Hi all,

The failure was caused by InetAddress.getLocalHost() which returns 
"127.0.1.1" on our Ubuntu18.04 machines.

JBS:    https://bugs.openjdk.java.net/browse/JDK-8235169
Webrev: http://cr.openjdk.java.net/~jiefu/8235169/webrev.00/

Could you please review it and give me some advice?

Thanks a lot.
Best regards,
Jie