Update vendor (github.com/mattermost)

vendor/github.com/mattermost/mattermost-server/einterfaces/cluster.go

@@ -0,0 +1,25 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package einterfaces
+
+import (
+	"github.com/mattermost/mattermost-server/model"
+)
+
+type ClusterMessageHandler func(msg *model.ClusterMessage)
+
+type ClusterInterface interface {
+	StartInterNodeCommunication()
+	StopInterNodeCommunication()
+	RegisterClusterMessageHandler(event string, crm ClusterMessageHandler)
+	GetClusterId() string
+	IsLeader() bool
+	GetMyClusterInfo() *model.ClusterInfo
+	GetClusterInfos() []*model.ClusterInfo
+	SendClusterMessage(cluster *model.ClusterMessage)
+	NotifyMsg(buf []byte)
+	GetClusterStats() ([]*model.ClusterStats, *model.AppError)
+	GetLogs(page, perPage int) ([]string, *model.AppError)
+	ConfigChanged(previousConfig *model.Config, newConfig *model.Config, sendToOtherServer bool) *model.AppError
+}