Add basic application framework and example application to show interaction between events an NBI

Depends on:

• !340 (merged)
• !344 (merged)
• !349 (merged)
• !342 (merged)

controller/topology/nodes/nodeStore.go

@@ -121,7 +121,7 @@ func (s *DatabaseNodeStore) GetAll() ([]Node, error) {
 	if err != nil {
 		log.Printf("Failed marshalling %v", err)
 
-		return loadedNode, errors.ErrCouldNotMarshall{StoreName: s.storeName}
+		return loadedNode, errors.ErrCouldNotMarshall{Type: loadedNode, Err: err}
 	}
 
 	return loadedNode, nil
@@ -138,7 +138,7 @@ func (s *DatabaseNodeStore) Add(node Node) error {
 		InsertOne(ctx, node)
 	if err != nil {
 		log.Printf("Could not add Node: %v", err)
-		return errors.ErrCouldNotCreate{StoreName: s.storeName}
+		return errors.ErrCouldNotCreate{Identifier: node.ID, Type: node, Err: err}
 	}
 
 	return nil
@@ -169,7 +169,7 @@ func (s *DatabaseNodeStore) Update(node Node) error {
 	if err != nil {
 		log.Printf("Could not update Node: %v", err)
 
-		return errors.ErrCouldNotUpdate{StoreName: s.storeName}
+		return errors.ErrCouldNotUpdate{Identifier: node.ID, Type: node, Err: err}
 	}
 
 	return nil