[Benchmark] JMH report in milliseconds instead of nanoseconds

Author: andsel

logstash-core/benchmarks/src/main/java/org/logstash/benchmark/BufferedTokenizerBenchmark.java

@@ -40,7 +40,7 @@
 @Measurement(iterations = 10, time = 3000, timeUnit = TimeUnit.MILLISECONDS)
 @Fork(1)
 @BenchmarkMode(Mode.Throughput)
-@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@OutputTimeUnit(TimeUnit.MILLISECONDS)
 @State(Scope.Thread)
 public class BufferedTokenizerBenchmark {