RFR: JDK-8373793: TestDynamicStore.java `/manual\' disables use of `/timeout\'

[Mikhail Yankelevich]

Minor fix to remove timeout for a manual test

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Commit messages:
 - JDK-8373793: TestDynamicStore.java `/manual\' disables use of `/timeout\'

Changes: https://git.openjdk.org/jdk/pull/28847/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28847&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8373793
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/28847.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28847/head:pull/28847

PR: https://git.openjdk.org/jdk/pull/28847