Fix TestKafkaMetrics#testPutMetrics

org.junit.ComparisonFailure: 
Expected :{"hostname": "localhost", "timestamp": 1491385648730, "date": "2017-04-05","time": "06:47:28","name": "Kafka record name" , "KafkaTag":  "test_tag", "KafkaCounter":  "123"}
Actual   :{"hostname": "localhost", "timestamp": 1491385648730, "date": "2017-04-05","time": "18:47:28","name": "Kafka record name" , "KafkaTag":  "test_tag", "KafkaCounter":  "123"}
	at org.junit.Assert.assertEquals(Assert.java:115)
	at org.junit.Assert.assertEquals(Assert.java:144)
	at org.apache.hadoop.metrics2.impl.TestKafkaMetrics.testPutMetrics(TestKafkaMetrics.java:148)