Minor - add waiting for test, bigger time for function

"waitVeryLongForThePageToBeLoaded"

tests/behat/features/bootstrap/FeatureContext.php

@@ -393,7 +393,7 @@ class FeatureContext extends MinkContext
     public function waitVeryLongForThePageToBeLoaded()
     {
         //$this->getSession()->wait(10000, "document.readyState === 'complete'");
-        $this->getSession()->wait(6000);
+        $this->getSession()->wait(8000);
     }
 
     /**

tests/behat/features/toolExercise.feature

@@ -373,8 +373,10 @@ Feature: Exercise tool
     And I select "B" from "choice_id_7_2"
     And I select "C" from "choice_id_7_3"
     And I press "Next question"
+    And wait for the page to be loaded
     And I check "1"
     And I press "Next question"
+    And wait for the page to be loaded
     And I press "End test"
     Then I should see "Score for the test: 190 / 190"
     And I should see the table "#category_results":