Integrated: 8289166: ProblemList tools/jlink/plugins/CompressorPluginTest.java

[Daniel D. Daugherty]

A trivial fix to ProblemList tools/jlink/plugins/CompressorPluginTest.java.

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Commit messages:
 - 8289166: ProblemList tools/jlink/plugins/CompressorPluginTest.java

Changes: https://git.openjdk.org/jdk/pull/9285/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9285&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8289166
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/9285.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9285/head:pull/9285

PR: https://git.openjdk.org/jdk/pull/9285