Suppress Rubocop warning

* using "with_start: false" would lead to a bigger refactoring

Author: jochenehret

lib/cloud_controller/diego/docker/staging_completion_handler.rb

@@ -25,10 +25,12 @@ def self.schema
           }
         end
 
+        # rubocop:disable Style/OptionalBooleanParameter
         def staging_complete(payload, with_start=false)
           super
           BitsExpiration.new.expire_packages!(build.app)
         end
+        # rubocop:enable Style/OptionalBooleanParameter
 
         private