RFR: 8262900: ToolBasicTest fails to access HTTP server it starts

[Jan Lahoda]

Trying to use `getLoopbackAddress()` instead of `getLocalHost()`, to start the HTTP server. It will hopefully be better accessible. Inspired by:
https://github.com/openjdk/jdk/pull/3137

-------------

Commit messages:
 - 8262900: ToolBasicTest fails to access HTTP server it starts

Changes: https://git.openjdk.java.net/jdk/pull/3301/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3301&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8262900
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3301.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3301/head:pull/3301

PR: https://git.openjdk.java.net/jdk/pull/3301