RFR: 8347629: Test FailOverDirectExecutionControlTest.java fails with -Xcomp

[Jan Lahoda]

The `FailOverDirectExecutionControlTest` test looks-up/creates a `Logger`, configures it, but it is not holding it while the test is running. As a consequence, the `Logger` may be GCed, loosing the configuration, and consequently failing the test.

The proposal in this PR is to hold the configured `Logger` instance for the duration of the test.

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Commit messages:
 - 8347629: Test FailOverDirectExecutionControlTest.java fails with -Xcomp

Changes: https://git.openjdk.org/jdk/pull/23265/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23265&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347629
  Stats: 4 lines in 1 file changed: 2 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/23265.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23265/head:pull/23265

PR: https://git.openjdk.org/jdk/pull/23265