RFR: JDK-8309957 Rename JDK-8309595 test to conform

[Jim Laskey]

As a matter of style, tests are typically in a class whose name begins Test in a directory whose name begins test.

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Commit messages:
 - Rename JDK-8309595 test

Changes: https://git.openjdk.org/jdk/pull/14453/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14453&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309957
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/14453.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14453/head:pull/14453

PR: https://git.openjdk.org/jdk/pull/14453