Use mattermost v5 module (#1192)

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

@@ -0,0 +1,42 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package model
+
+import (
+	"encoding/json"
+	"io"
+)
+
+const (
+	PluginStateNotRunning          = 0
+	PluginStateStarting            = 1 // unused by server
+	PluginStateRunning             = 2
+	PluginStateFailedToStart       = 3
+	PluginStateFailedToStayRunning = 4
+	PluginStateStopping            = 5 // unused by server
+)
+
+// PluginStatus provides a cluster-aware view of installed plugins.
+type PluginStatus struct {
+	PluginId    string `json:"plugin_id"`
+	ClusterId   string `json:"cluster_id"`
+	PluginPath  string `json:"plugin_path"`
+	State       int    `json:"state"`
+	Name        string `json:"name"`
+	Description string `json:"description"`
+	Version     string `json:"version"`
+}
+
+type PluginStatuses []*PluginStatus
+
+func (m *PluginStatuses) ToJson() string {
+	b, _ := json.Marshal(m)
+	return string(b)
+}
+
+func PluginStatusesFromJson(data io.Reader) PluginStatuses {
+	var m PluginStatuses
+	json.NewDecoder(data).Decode(&m)
+	return m
+}