Add new line protocol parser and serializer, influxdb output (#3924)

plugins/outputs/graylog/graylog.go

@@ -7,12 +7,13 @@ import (
 	"encoding/binary"
 	ejson "encoding/json"
 	"fmt"
-	"github.com/influxdata/telegraf"
-	"github.com/influxdata/telegraf/plugins/outputs"
 	"io"
 	"math"
 	"net"
 	"os"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/plugins/outputs"
 )
 
 const (
@@ -212,7 +213,7 @@ func serialize(metric telegraf.Metric) ([]string, error) {
 
 	m := make(map[string]interface{})
 	m["version"] = "1.1"
-	m["timestamp"] = metric.UnixNano() / 1000000000
+	m["timestamp"] = metric.Time().UnixNano() / 1000000000
 	m["short_message"] = "telegraf"
 	m["name"] = metric.Name()