RFR: 8265082: test/hotspot/jtreg/gc/g1/TestG1SkipCompaction.java fails validate-source

[Daniel D.Daugherty]

A trivial fix to fix the "validate-source" failure in Tier1 due to the bad copyright
header in test/hotspot/jtreg/gc/g1/TestG1SkipCompaction.java.

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Commit messages:
 - 8265082: test/hotspot/jtreg/gc/g1/TestG1SkipCompaction.java fails validate-source

Changes: https://git.openjdk.java.net/jdk/pull/3438/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3438&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265082
  Stats: 8 lines in 1 file changed: 4 ins; 2 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3438.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3438/head:pull/3438

PR: https://git.openjdk.java.net/jdk/pull/3438