fixing missing connection dependecy injection

app/repositories/orient_db/learning_object_repository.rb

@@ -64,7 +64,7 @@ module OrientDb
     end
 
     def create_relations(learning_object)
-      relations = OrientDb::LearningObject::RelationsChain.new(learning_object)
+      relations = OrientDb::LearningObject::RelationsChain.new(learning_object, connection)
       relations.create
     end
 

app/repositories/orient_db/subject_repository.rb

@@ -44,7 +44,7 @@ module OrientDb
     end
 
     def create_relations(subject)
-      OrientDb::Subject::RelationsChain.new(subject).create
+      OrientDb::Subject::RelationsChain.new(subject, connection).create
     end
 
     def build_hash(object)