WSM: Fix error on OrderManager not enabled

It's okay for OrderManager to not be enabled; It's configurable.
Remove the WSM setup protection and move it to runtime using IsRunning.

Left the WSM deps so they can be fixed as apporpriate to each.

engine/subsystem_types.go

@@ -53,6 +53,7 @@ type iCommsManager interface {
 
 // iOrderManager defines a limited scoped order manager
 type iOrderManager interface {
+	IsRunning() bool
 	Exists(*order.Detail) bool
 	Add(*order.Detail) error
 	Cancel(context.Context, *order.Cancel) error

engine/websocketroutine_manager.go

@@ -22,9 +22,6 @@ func setupWebsocketRoutineManager(exchangeManager iExchangeManager, orderManager
 	if exchangeManager == nil {
 		return nil, errNilExchangeManager
 	}
-	if orderManager == nil {
-		return nil, errNilOrderManager
-	}
 	if syncer == nil {
 		return nil, errNilCurrencyPairSyncer
 	}
@@ -287,6 +284,9 @@ func (m *WebsocketRoutineManager) websocketDataHandler(exchName string, data int
 		}
 		m.syncer.PrintOrderbookSummary(base, "websocket", nil)
 	case *order.Detail:
+		if !m.orderManager.IsRunning() {
+			return nil
+		}
 		if !m.orderManager.Exists(d) {
 			err := m.orderManager.Add(d)
 			if err != nil {
@@ -310,6 +310,9 @@ func (m *WebsocketRoutineManager) websocketDataHandler(exchName string, data int
 			m.printOrderSummary(od, true)
 		}
 	case []order.Detail:
+		if !m.orderManager.IsRunning() {
+			return nil
+		}
 		for x := range d {
 			if !m.orderManager.Exists(&d[x]) {
 				err := m.orderManager.Add(&d[x])

engine/websocketroutine_manager_test.go

@@ -22,11 +22,6 @@ func TestWebsocketRoutineManagerSetup(t *testing.T) {
 	}
 
 	_, err = setupWebsocketRoutineManager(NewExchangeManager(), (*OrderManager)(nil), nil, nil, false)
-	if !errors.Is(err, errNilOrderManager) {
-		t.Errorf("error '%v', expected '%v'", err, errNilOrderManager)
-	}
-
-	_, err = setupWebsocketRoutineManager(NewExchangeManager(), &OrderManager{}, nil, nil, false)
 	if !errors.Is(err, errNilCurrencyPairSyncer) {
 		t.Errorf("error '%v', expected '%v'", err, errNilCurrencyPairSyncer)
 	}

engine/websocketroutine_manager_types.go

@@ -8,7 +8,6 @@ import (
 )
 
 var (
-	errNilOrderManager                 = errors.New("nil order manager received")
 	errNilCurrencyPairSyncer           = errors.New("nil currency pair syncer received")
 	errNilCurrencyConfig               = errors.New("nil currency config received")
 	errNilCurrencyPairFormat           = errors.New("nil currency pair format received")