Cleanup of tests test/jdk/java/net and test/jdk/sun/net that format hexadecimal strings to use java.util.HexFormat methods. Also in tests test/jdk/java/util/Locale/SoftKeys.
------------- Commit messages: - 8259493: [test] Use HexFormat instead of adhoc hex utilities in network code and locale SoftKeys Changes: https://git.openjdk.java.net/jdk/pull/2009/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2009&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8259493 Stats: 75 lines in 5 files changed: 2 ins; 63 del; 10 mod Patch: https://git.openjdk.java.net/jdk/pull/2009.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/2009/head:pull/2009 PR: https://git.openjdk.java.net/jdk/pull/2009
