RFR: 8272551: mark hotspot runtime/modules tests which ignore external VM flags

[Igor Ignatyev]

Hi all,

could you please review the patch that adds `@requires vm.flagless` to `runtime/modules` tests that ignore external flags?

Thanks,
-- Igor

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Commit messages:
 - copyright
 - 8272551

Changes: https://git.openjdk.java.net/jdk/pull/5131/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5131&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272551
  Stats: 25 lines in 20 files changed: 20 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5131.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5131/head:pull/5131

PR: https://git.openjdk.java.net/jdk/pull/5131