Overhauls `EmptyAuthenticate` to - Test all supported HTTP versions (i.e., HTTP/1.1 and HTTP/2) - Test both clear-text and SSL - Use `HttpServerAdapters.HttpTestServer::create` to avoid host-related problems
------------- Commit messages: - Overhaul `EmptyAuthenticate` Changes: https://git.openjdk.org/jdk/pull/24542/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24542&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8352431 Stats: 121 lines in 1 file changed: 82 ins; 19 del; 20 mod Patch: https://git.openjdk.org/jdk/pull/24542.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/24542/head:pull/24542 PR: https://git.openjdk.org/jdk/pull/24542
