Add bulk replace to registrar area

#662

app/controllers/registrar/bulk_change_controller.rb

@@ -0,0 +1,20 @@
+class Registrar
+  class BulkChangeController < DeppController
+    helper_method :available_contacts
+
+    def new
+      authorize! :manage, :repp
+      render file: 'registrar/bulk_change/new', locals: { active_tab: default_tab }
+    end
+
+    private
+
+    def available_contacts
+      current_user.registrar.contacts.order(:name).pluck(:name, :code)
+    end
+
+    def default_tab
+      :technical_contact
+    end
+  end
+end