Change go-metrics-graphit to our own fork (#106)

Original go-metrics-graphite is no longer maintained so we created our
own fork with critical fixes.

Gopkg.toml

@@ -45,14 +45,14 @@
   name = "github.com/rcrowley/go-metrics"
   revision = "1f30fe9094a513ce4c700b9a54458bbb0c96996c"
 
-[[constraint]]
-  name = "github.com/cyberdelia/go-metrics-graphite"
-  revision = "39f87cc3b432bbb898d7c643c0e93cac2bc865ad"
-
 [[constraint]]
   name = "github.com/go-logfmt/logfmt"
   version = "0.3.0"
 
 [[constraint]]
   branch = "master"
   name = "golang.org/x/time"
+
+[[constraint]]
+  name = "github.com/allegro/go-metrics-graphite"
+  revision = "d8aec135f2c1e2d0fd86f55e9b85427ba6592490"

metrics/graphite.go

@@ -6,7 +6,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/cyberdelia/go-metrics-graphite"
+	"github.com/allegro/go-metrics-graphite"
 	"github.com/kelseyhightower/envconfig"
 	"github.com/rcrowley/go-metrics"
 	log "github.com/sirupsen/logrus"
@@ -47,8 +47,8 @@ type GraphiteConfig struct {
 // SetupGraphite will configure metric system to periodically send metrics to
 // Graphite.
 func SetupGraphite(cfg GraphiteConfig) error {
-	addr, err := net.ResolveTCPAddr("tcp", fmt.Sprintf("%s:%d", cfg.Host, cfg.Port))
-	if err != nil {
+	addr := fmt.Sprintf("%s:%d", cfg.Host, cfg.Port)
+	if _, err := net.ResolveTCPAddr("tcp", addr); err != nil {
 		return fmt.Errorf("invalid Graphite address: %s", err)
 	}
 	go graphite.Graphite(metrics.DefaultRegistry, time.Minute, buildUniquePrefix(cfg.Prefix), addr)