[jdk11u-dev] RFR: 8271094: runtime/duplAttributes/DuplAttributesTest.java doesn't check exit code

[Andrew Lu]

I backport this for parity with 11.0.23-oracle.
test/hotspot/jtreg/runtime/duplAttributes/DuplAttributesTest.java
Copyright.

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Commit messages:
 - Backport 4812e537919dc1b1c08a2a8ddc0c9cb1c69a7744

Changes: https://git.openjdk.org/jdk11u-dev/pull/2418/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2418&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8271094
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2418.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2418/head:pull/2418

PR: https://git.openjdk.org/jdk11u-dev/pull/2418