Switch skipped kafka test

plugins/inputs/kafka_consumer/kafka_consumer_integration_test.go

@@ -17,7 +17,6 @@ func TestReadsMetricsFromKafka(t *testing.T) {
 	if testing.Short() {
 		t.Skip("Skipping integration test in short mode")
 	}
-	t.Skip("Skipping test due to circleci issue; ref #2487")
 
 	brokerPeers := []string{testutil.GetLocalHost() + ":9092"}
 	testTopic := fmt.Sprintf("telegraf_test_topic_%d", time.Now().Unix())