Use mattermost v5 module (#1192)

vendor/github.com/mattermost/mattermost-server/v5/model/cluster_stats.go

@@ -0,0 +1,27 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package model
+
+import (
+	"encoding/json"
+	"io"
+)
+
+type ClusterStats struct {
+	Id                        string `json:"id"`
+	TotalWebsocketConnections int    `json:"total_websocket_connections"`
+	TotalReadDbConnections    int    `json:"total_read_db_connections"`
+	TotalMasterDbConnections  int    `json:"total_master_db_connections"`
+}
+
+func (me *ClusterStats) ToJson() string {
+	b, _ := json.Marshal(me)
+	return string(b)
+}
+
+func ClusterStatsFromJson(data io.Reader) *ClusterStats {
+	var me *ClusterStats
+	json.NewDecoder(data).Decode(&me)
+	return me
+}