Updated Vendoring

It resolves issues #474 and #589 which were coming from libcompose,
as well as resolves #440 and #437 partially as `group_add` & `stop_grace_period`
are supported by libcompose now.

vendor/github.com/docker/libcompose/utils/util.go

@@ -3,6 +3,7 @@ package utils
 import (
 	"encoding/json"
 	"sync"
+	"time"
 
 	"github.com/Sirupsen/logrus"
 
@@ -160,3 +161,18 @@ func ConvertKeysToStrings(item interface{}) interface{} {
 		return item
 	}
 }
+
+// DurationStrToSecondsInt converts duration string to *int in seconds
+func DurationStrToSecondsInt(s string) *int {
+	if s == "" {
+		return nil
+	}
+	duration, err := time.ParseDuration(s)
+	if err != nil {
+		logrus.Errorf("Failed to parse duration:%v", s)
+		return nil
+	}
+	r := (int)(duration.Seconds())
+	return &r
+
+}