Replace `scoped` in Rails 3 for `all` in Rails 4

app/queries/carto/data_import_query_builder.rb

@@ -27,7 +27,7 @@ class Carto::DataImportQueryBuilder
   end
 
   def build
-    query = Carto::DataImport
+    query = Carto::DataImport.all
 
     if @user_id
       query = query.where(user_id: @user_id)

app/queries/carto/visualization_query_builder.rb

@@ -205,7 +205,7 @@ class Carto::VisualizationQueryBuilder
   end
 
   def build
-    query = Carto::Visualization
+    query = Carto::Visualization.all
 
     if @name && !(@id || @user_id || @organization_id || @owned_by_or_shared_with_user_id || @shared_with_user_id)
       CartoDB::Logger.debug(message: "VQB query by name without user_id nor org_id")