fixed fixture controller config for applications

tests/codeception/bin/yii

@@ -18,7 +18,8 @@ $config = yii\helpers\ArrayHelper::merge(
             'fixture' => [
                 'class' => 'yii\faker\FixtureController',
                 'fixtureDataPath' => '@tests/codeception/fixtures',
-                'templatePath' => '@tests/codeception/templates'
+                'templatePath' => '@tests/codeception/templates',
+                'namespace' => 'tests\codeception\fixtures',
             ],
         ],
     ]