Change response code from phrase to code and 'phrase' by 'reason phrase'

spec/test/features/control/delete/error_notfound.feature

@@ -8,6 +8,6 @@ Feature: Fail to delete a route in Kapow! server.
 
     Given I have a just started Kapow! server
     When I delete the route with id "xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx"
-    Then I get not found as response code
-      And I get "Not Found" as response phrase
+    Then I get 404 as response code
+      And I get "Not Found" as response reason phrase
       And I get an empty response body