Show registrar's accounting customer code in UI

#343

app/views/admin/registrars/show.haml

@@ -42,6 +42,9 @@
           %dt= Registrar.human_attribute_name :website
           %dd= @registrar.website
 
+          %dt= Registrar.human_attribute_name :accounting_customer_code
+          %dd= @registrar.accounting_customer_code
+
   .col-md-6
     .panel.panel-default
       .panel-heading

test/controllers/admin/registrars/show_test.rb

@@ -0,0 +1,13 @@
+require 'test_helper'
+
+class RegistrarsControllerTest < ActionDispatch::IntegrationTest
+  def setup
+    login_as create(:admin_user)
+  end
+
+  def test_accounting_customer_code
+    registrar = create(:registrar, accounting_customer_code: 'test accounting customer code')
+    visit admin_registrar_path(registrar)
+    assert_text 'test accounting customer code'
+  end
+end