Fixed an issue with exit exceptions (#4923)

* Fixed an issue where exceptions in the Yii app resulted in exceptions in the Yii module

* Fix test skipping

* Fix syntax error

* Update  comments

Author: SamMousa

src/Codeception/Lib/Connector/Yii2.php

@@ -184,13 +184,12 @@ public function doRequest($request)
                 // to expect error response codes in tests.
                 $app->errorHandler->discardExistingOutput = false;
                 $app->errorHandler->handleException($e);
-                $response = $app->response;
-
             } elseif (!$e instanceof ExitException) {
                 // for exceptions not related to Http, we pass them to Codeception
                 $this->resetApplication();
                 throw $e;
             }
+            $response = $app->response;
         }
 
         $this->encodeCookies($response, $yiiRequest, $app->security);