PLT-4357 adding performance monitoring (#4622)

* WIP

* WIP

* Adding metrics collection

* updating vendor packages

* Adding metrics to config

* Adding admin console page for perf monitoring

* Updating glide

* switching to tylerb/graceful

model/websocket_message.go

@@ -34,6 +34,7 @@ type WebSocketMessage interface {
 	IsValid() bool
 	DoPreComputeJson()
 	GetPreComputeJson() []byte
+	EventType() string
 }
 
 type WebsocketBroadcast struct {
@@ -63,6 +64,10 @@ func (o *WebSocketEvent) IsValid() bool {
 	return o.Event != ""
 }
 
+func (o *WebSocketEvent) EventType() string {
+	return o.Event
+}
+
 func (o *WebSocketEvent) DoPreComputeJson() {
 	b, err := json.Marshal(o)
 	if err != nil {
@@ -120,6 +125,10 @@ func (o *WebSocketResponse) IsValid() bool {
 	return o.Status != ""
 }
 
+func (o *WebSocketResponse) EventType() string {
+	return ""
+}
+
 func (o *WebSocketResponse) ToJson() string {
 	b, err := json.Marshal(o)
 	if err != nil {