MAGETWO-44975: Incorrect messgae on success page after extension installation

Refactoring

Author: Igor Melnikov

setup/pub/magento/setup/app.js

@@ -35,9 +35,9 @@ app.config(['$httpProvider', '$stateProvider', function ($httpProvider, $statePr
     if (!$httpProvider.defaults.headers.get) {
         $httpProvider.defaults.headers.get = {};
     }
-    $httpProvider.defaults.headers.get['If-Modified-Since'] = 'Mon, 26 Jul 1997 05:00:00 GMT';
-    $httpProvider.defaults.headers.get['Cache-Control'] = 'no-cache';
+    $httpProvider.defaults.headers.get['Cache-Control'] = 'no-cache, no-store, must-revalidate';
     $httpProvider.defaults.headers.get['Pragma'] = 'no-cache';
+    $httpProvider.defaults.headers.get['Expires'] = 0;
     app.stateProvider = $stateProvider;
 }])
     .config(function($provide) {