added implementation for cf notification producer

common/queue/src/main/java/org/thingsboard/server/queue/provider/TbRuleEngineProducerProvider.java

@@ -50,6 +50,7 @@ public class TbRuleEngineProducerProvider implements TbQueueProducerProvider {
     private TbQueueProducer<TbProtoQueueMsg<ToEdgeNotificationMsg>> toEdgeNotifications;
     private TbQueueProducer<TbProtoQueueMsg<ToEdgeEventNotificationMsg>> toEdgeEvents;
     private TbQueueProducer<TbProtoQueueMsg<ToCalculatedFieldMsg>> toCalculatedFields;
+    private TbQueueProducer<TbProtoQueueMsg<ToCalculatedFieldNotificationMsg>> toCalculatedFieldNotifications;
 
     public TbRuleEngineProducerProvider(TbRuleEngineQueueFactory tbQueueProvider) {
         this.tbQueueProvider = tbQueueProvider;
@@ -132,7 +133,7 @@ public class TbRuleEngineProducerProvider implements TbQueueProducerProvider {
 
     @Override
     public TbQueueProducer<TbProtoQueueMsg<ToCalculatedFieldNotificationMsg>> getCalculatedFieldsNotificationsMsgProducer() {
-        throw new RuntimeException("Not Implemented! Should not be used by Rule Engine Service!");
+        return toCalculatedFieldNotifications;
     }
 
 }