Modified `getService` method to prevent caching of `ServiceKey`, which was negatively impacting multithreaded performance
------------- Commit messages: - changed ServiceKey initialization to prevent caching Changes: https://git.openjdk.org/jdk/pull/16403/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16403&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8317538 Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/16403.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/16403/head:pull/16403 PR: https://git.openjdk.org/jdk/pull/16403
