`HttpURLConnectionExpectContinueTest` was throwing an error due to port being hardcoded, updated test to let the system decide which port to use.
------------- Commit messages: - change test to use ephemeral port Changes: https://git.openjdk.org/jdk/pull/14177/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14177&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8308336 Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/14177.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/14177/head:pull/14177 PR: https://git.openjdk.org/jdk/pull/14177
