RFR: 8261157: Incorrect GPL header after JDK-8259956

[Erik Gahlin]

Hi,

Could I have a review of a change to a copyright header for a test file. 

Thanks
Erik

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Commit messages:
 - Initial

Changes: https://git.openjdk.java.net/jdk/pull/2408/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2408&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8261157
  Stats: 9 lines in 1 file changed: 4 ins; 2 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2408.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2408/head:pull/2408

PR: https://git.openjdk.java.net/jdk/pull/2408