stream: set connection monitor delay. (#1120)

* stream: set connection monitor delay.

- this fixes a bug where the connection monitor delay config value does not
get set to the websocket on intialization.

* multi: add connection monitor delay to exchange config.

- this adds the connection monitor delay config option to the exchange type.
- the validate function of the exchange type has been updated to validate the
connection monitor delay value as well.

* multi: resolve review issues.

exchanges/bithumb/bithumb_wrapper.go

@@ -174,13 +174,14 @@ func (b *Bithumb) Setup(exch *config.Exchange) error {
 		return err
 	}
 	err = b.Websocket.Setup(&stream.WebsocketSetup{
-		ExchangeConfig:        exch,
-		DefaultURL:            wsEndpoint,
-		RunningURL:            ePoint,
-		Connector:             b.WsConnect,
-		Subscriber:            b.Subscribe,
-		GenerateSubscriptions: b.GenerateSubscriptions,
-		Features:              &b.Features.Supports.WebsocketCapabilities,
+		ExchangeConfig:         exch,
+		DefaultURL:             wsEndpoint,
+		RunningURL:             ePoint,
+		Connector:              b.WsConnect,
+		Subscriber:             b.Subscribe,
+		GenerateSubscriptions:  b.GenerateSubscriptions,
+		ConnectionMonitorDelay: exch.ConnectionMonitorDelay,
+		Features:               &b.Features.Supports.WebsocketCapabilities,
 	})
 	if err != nil {
 		return err