RFR: 8289997: gc/g1/TestVerificationInConcurrentCycle.java fails due to use of debug-only option

[Thomas Schatzl]

Hi all,

  can I have reviews for this change that fixes failures in product VMs due to use of a debug-only verification option?

The change has the VM ignore that option as needed.

Thanks,
  Thomas

Testing: local testing

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Commit messages:
 - Fix test

Changes: https://git.openjdk.org/jdk/pull/9424/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9424&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8289997
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/9424.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9424/head:pull/9424

PR: https://git.openjdk.org/jdk/pull/9424