fix (integrations-customers): scope integration customer under correc…

…t organization (#2223)

## Context

Lago is actively adding new integrations

## Description

When creating integration customer, we should assign valid
`integration_id` to it. If multiple organizations use the same `code`
for certain `integration` object, there is a chance that wrong
`integration` would be assign to the integration customer.

app/services/integration_customers/create_or_update_service.rb

@@ -72,7 +72,7 @@ def integration
 
       code = integration_customer_params[:integration_code]
 
-      @integration = Integrations::BaseIntegration.find_by(type:, code:)
+      @integration = Integrations::BaseIntegration.find_by(type:, code:, organization: customer.organization)
     end
 
     def integration_customer

spec/services/integration_customers/create_or_update_service_spec.rb

@@ -152,8 +152,15 @@
       let(:external_customer_id) { nil }
       let(:new_customer) { true }
 
+      let(:integration_two) { create(:netsuite_integration, organization: organization_two, code: integration.code) }
+      let(:organization_two) { create(:organization) }
+
+      before { integration_two }
+
       it 'calls create job' do
-        expect { service_call }.to have_enqueued_job(IntegrationCustomers::CreateJob)
+        expect do
+          service_call
+        end.to have_enqueued_job(IntegrationCustomers::CreateJob).with(hash_including(integration:))
       end
 
       context 'when updating existing customer without integration customer' do