Update the recently added LoggerFinder tests to cater for a possible condition where the test finishes before the boot logger executor service has flushed its pending data.
By simulating a slow thread in the ExecutorService used in BootstrapLogger, I was able to reproduce the issue described. Adding the `BootstrapLoggerUtils.awaitPending();` call allows the tests to pass. ------------- Commit messages: - refactory testlibrary name - 8315696 Changes: https://git.openjdk.org/jdk/pull/15571/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15571&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8315696 Stats: 147 lines in 8 files changed: 74 ins; 64 del; 9 mod Patch: https://git.openjdk.org/jdk/pull/15571.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15571/head:pull/15571 PR: https://git.openjdk.org/jdk/pull/15571
